A Classification of Future Internet Enterprise Systems Projects. - Yannis Charalabidis; Fenareti Lampathaki; Charalampos Alexopoulos; Panagiotis Kokkinakos; Sotirios Koussouris (I-ESA, 2012)

A Methodology for Evaluating PSI E-infrastructures Based on Multiple Value Models. - Charalampos Alexopoulos; Euripidis N. Loukis; Yannis Charalabidis; I. Tagkopoulos (Panhellenic Conference on Informatics, 2012)

Open data movement in Greece: a case study on open government data sources. - Charalampos Alexopoulos; Lefkothea Spiliotopoulou; Yannis Charalabidis (Panhellenic Conference on Informatics, 2013)

Designing a Second Generation of Open Data Platforms: Integrating Open Data and Social Media. - Charalampos Alexopoulos; Anneke Zuiderwijk; Yannis Charalabidis; Euripidis N. Loukis; Marijn Janssen (EGOV, 2014)

Evaluating Second Generation Open Government Data Infrastructures Using Value Models. - Yannis Charalabidis; Euripidis N. Loukis; Charalampos Alexopoulos (HICSS, 2014)

An Open Data and Open Services Repository for Supporting Citizen-Driven Application Development for Governance. - Yannis Charalabidis; Charalampos Alexopoulos; Vasiliki Diamantopoulou; Aggeliki Androutsopoulou (HICSS, 2016)

A methodology for determining the value generation mechanism and the improvement priorities of open government data systems. - Charalampos Alexopoulos; Euripidis N. Loukis; Yannis Charalabidis (Comput. Sci. Inf. Syst., 2016)

A taxonomy of open government data research areas and topics. - Yannis Charalabidis; Charalampos Alexopoulos; Euripidis N. Loukis (J. Organ. Comput. Electron. Commer., 2016)

Tracking the Evolution of OGD Portals: A Maturity Model. - Charalampos Alexopoulos; Vasiliki Diamantopoulou; Yannis Charalabidis (EGOV, 2017)

Scientific foundations training and entrepreneurship activities in the domain of ICT-enabled governance. - Gabriela Viale Pereira; Yannis Charalabidis; Charalampos Alexopoulos; Francesco Mureddu; Peter Parycek; Alexander Ronzhyn; Dimitris Sarantis; Leif Skiftenes Flak; Maria A. Wimmer (DG.O, 2018)

A Taxonomy for Analysing Smart Cities Developments in Greece. - Charalampos Alexopoulos; Yannis Charalabidis; Nikolaos Vogiatzis; Dimitrios E. Kolokotronis (ICEGOV, 2018)

"Peri Nomou" System: Automated Codification and Interrelation of Legal Elements Based on Text Mining. - Zoi Lachana; Michalis Avgerinos Loutsaris; Charalampos Alexopoulos; Yannis Charalabidis (MCIS, 2018)

A Methodology for Economic Crisis Policy Analytics. - Euripidis N. Loukis; Spyros Arvanitis; Charalampos Alexopoulos (MCIS, 2018)

The Three Generations of Electronic Government: From Service Provision to Open Data and to Policy Analytics. - Yannis Charalabidis; Euripidis N. Loukis; Charalampos Alexopoulos; Zoi Lachana (EGOV, 2019)

Using Disruptive Technologies in Government: Identification of Research and Training Needs. - Alexander Ronzhyn; Maria A. Wimmer; Vera Spitzer; Gabriela Viale Pereira; Charalampos Alexopoulos (EGOV, 2019)

Benefits and Obstacles of Blockchain Applications in e-Government. - Charalampos Alexopoulos; Yannis Charalabidis; Aggeliki Androutsopoulou; Michalis Avgerinos Loutsaris; Zoi Lachana (HICSS, 2019)

Introduction to the Minitrack on Data-driven Government: Creating value from Big and Open Linked Data. - Marijn Janssen; Judie Attard; Charalampos Alexopoulos (HICSS, 2019)

How Machine Learning is Changing e-Government. - Charalampos Alexopoulos; Zoi Lachana; Aggeliki Androutsopoulou; Vasiliki Diamantopoulou; Yannis Charalabidis; Michalis Avgerinos Loutsaris (ICEGOV, 2019)

A Taxonomy of Smart Cities Initiatives. - Charalampos Alexopoulos; Gabriela Viale Pereira; Yannis Charalabidis; Lorenzo Madrid (ICEGOV, 2019)

Use Case Scenarios on Legal Text Mining. - Yannis Charalabidis; Michalis Avgerinos Loutsaris; Shefali Virkar; Charalampos Alexopoulos; Anna-Sophie Novak; Zoi Lachana (ICEGOV, 2019)

The Evolving e-Governance Curriculum: A Worldwide mapping of Education Programs. - Demetrios Sarantis; Soumaya I. Ben Dhaou; Charalampos Alexopoulos; Alexander Ronzhyn; Gabriela Viale Pereira; Yannis Charalabidis (ICEGOV, 2019)

Convergence and Divergence Between Municipalities and Citizens about Smart City Actions' Priorities. - Yannis Charalabidis; Euripidis N. Loukis; Charalampos Alexopoulos; Nikolaos Vogiatzis; Dimitrios E. Kolokotronis (DG.O, 2020)

Gamification in Public Service Provisioning: Investigation of Research Needs. - Alexander Ronzhyn; Maria A. Wimmer; Gabriela Viale Pereira; Charalampos Alexopoulos (DG.O, 2020)

Towards an Open Data Research Ecosystem in Croatia. - Bastiaan van Loenen; Frederika Welle Donker; Anneke Zuiderwijk; Drazen Tutic; Charalampos Alexopoulos (EGOV-CeDEM-ePart-*, 2020)

Blockchain in Digital Government: Research Needs Identification. - Demetrios Sarantis; Charalampos Alexopoulos; Yannis Charalabidis; Zoi Lachana; Michalis Avgerinos Loutsaris (EMCIS, 2020)

Analysing Legal Information Requirements for Public Policy Making. - Charalampos Alexopoulos; Shefali Virkar; Michalis Avgerinos Loutsaris; Anna-Sophie Novak; Euripidis N. Loukis (ePart, 2020)

Assessing the quality of e-Government services for entrepreneurship: a comparative study in Russia's regions. - Alexander M. Pakhalov; Natalia A. Rozhkova; Charalampos Alexopoulos (ICEGOV, 2020)

Architecting an innovative big open legal data analytics, search and retrieval platform. - Stefania Stavropoulou; Ilias Romas; Sofia Tsekeridou; Michalis Avgerinos Loutsaris; Thomas J. Lampoltshammer; Lörinc Thurnay; Shefali Virkar; Günther Schefbeck; Nektarios Kyriakou; Zoi Lachana; Charalampos Alexopoulos; Yannis Charalabidis (ICEGOV, 2020)

User-centric decision support system design in legal informatics: a typology of users. - Shefali Virkar; Charalampos Alexopoulos; Stefania Stavropoulou; Sofia Tsekeridou; Anna-Sophie Novak (ICEGOV, 2020)

Automated Analysis and Interrelation of Legal Elements Based on Text Mining. - Zoi Lachana; Michalis Avgerinos Loutsaris; Charalampos Alexopoulos; Yannis Charalabidis (Int. J. E Serv. Mob. Appl., 2020)

Legal Text Processing: Combing two legal ontological approaches through text mining. - Michalis Avgerinos Loutsaris; Zoi Lachana; Charalampos Alexopoulos; Yannis Charalabidis (DG.O, 2021)

Mapping negative unintended consequences of disruptive technologies use in smart cities. - Nina Rizun; Magdalena Ciesielska; Gabriela Viale Pereira; Charalampos Harris Alexopoulos (ECIS, 2021)

Towards Smart Cities 4.0: Digital Participation in Smart Cities Solutions and the Use of Disruptive Technologies. - Charalampos Alexopoulos; Panagiotis Keramidis; Gabriela Viale Pereira; Yannis Charalabidis (EMCIS, 2021)

Evaluating Second Generation Cross-Country Open Legal Data Infrastructures Using Value Models. - Charalampos Alexopoulos; Euripides N. Loukis; Shefali Virkar (ePart, 2021)

Clustering legal artifacts using text mining. - Zoi Lachana; Michalis Avgerinos Loutsaris; Charalampos Alexopoulos; Yannis Charalabidis (ICEGOV, 2021)

A Methodology for Evaluating Advanced Legal Data Infrastructures. - Shefali Virkar; Euripidis N. Loukis; Charalampos Alexopoulos (ICEGOV, 2021)

A Comprehensive Framework for Measuring Governments' Digital Initiatives Including Open Data. - Mohsan Ali; Ioannis Zlatinis; Charalampos Alexopoulos; Yannis Charalabidis; Loukis Euripides (EMCIS, 2022)

Concept for an Open Data Ecosystem to Build a Powerful Data Environment. - Larisa Hrustek; Renata Mekovec; Charalampos Alexopoulos (EMCIS, 2022)

A comprehensive review of open data platforms, prevalent technologies, and functionalities. - Mohsan Ali; Charalampos Alexopoulos; Yannis Charalabidis (ICEGOV, 2022)

Assessing Information and System Quality of Open Government Data Portals in Croatia. - Karlo Kevic; Charalampos Alexopoulos; Ana Kuvezdic Divjak (ICEGOV, 2022)

Ethical and Legal Aspects of Digital Forensics Algorithms: The Case of Digital Evidence Acquisition. - Maria Ioanna Maratsi; Oliver Popov; Charalampos Alexopoulos; Yannis Charalabidis (ICEGOV, 2022)

Towards Perso-Arabic Urdu Language Hate Detection Using Machine Learning: A Comparative Study Based on a Large Dataset and Time-Complexity. - Mohsan Ali; Ali Muhammad; Muhammad Asad 008; Makhdoom Sajawal; Charalampos Alexopoulos; Yannis Charalabidis (PCI, 2022)

Analysis of Reviews on Greek Municipalities to Improve Public Service Delivery and Citizen Satisfaction: A Tool for Co-creation and Co-design. - Mohsan Ali; Maria Ioanna Maratsi; Loukis Euripides; Charalampos Alexopoulos; Yannis Charalabidis (PCI, 2022)

A user-centred analysis of decision support requirements in legal informatics. - Shefali Virkar; Charalampos Alexopoulos; Sofia Tsekeridou; Anna-Sophie Novak (Gov. Inf. Q., 2022)

Analyzing Open Government High Value Datasets: Availability, Publishers' Contribution and Technical Specifications. - Maria Ioanna Maratsi; Mohsan Ali; Charalampos Alexopoulos; Stuti Saxena; Nina Rizun; Yannis Charalabidis (BIR, 2023)

Open Government Data in Educational Programs Curriculum: Current State and Prospects. - Georgios Papageorgiou; Euripidis N. Loukis; Georgios Pappas; Nina Rizun; Stuti Saxena; Yannis Charalabidis; Charalampos Alexopoulos (BIR, 2023)

Moderating effects of gender, perceived importance and usage experience towards Open Government Data (OGD) adoption and usage. - Charalampos Alexopoulos; Stuti Saxena (DG.O, 2023)

Identification of High-Value Dataset determinants: is there a silver bullet for efficient sustainability-oriented data-driven development? - Anastasija Nikiforova; Charalampos Alexopoulos; Nina Rizun; Magdalena Ciesielska (DG.O, 2023)

How do personality traits influence Open Government Data (OGD) adoption and usage? Investigating the indirect and moderating effects. - Nina Rizun; Charalampos Alexopoulos; Stuti Saxena; Fernando Kleiman; Ricardo Matheus (DG.O, 2023)

ChatGPT Application vis-a-vis Open Government Data (OGD): Capabilities, Public Values, Issues and a Research Agenda. - Euripides N. Loukis; Stuti Saxena; Nina Rizun; Maria Ioanna Maratsi; Mohsan Ali; Charalampos Alexopoulos (EGOV, 2023)

A Categorization of Cross-Domain Semantic Interoperability Challenges for Open (Government) Data (short paper). - Maria Ioanna Maratsi; Yannis Charalabidis; Charalampos Alexopoulos (EGOV-CeDEM-ePart-*, 2023)

Towards High-Value Datasets Determination for Data-Driven Development: A Systematic Literature Review. - Anastasija Nikiforova; Nina Rizun; Magdalena Ciesielska; Charalampos Alexopoulos; Andrea Miletic (EGOV, 2023)

A Chatbot Generator for Improved Digital Governance. - Christos Bouras; Damianos Diasakos; Chrysostomos-Athanasios Katsigiannis; Vasileios Kokkinos; Apostolos Gkamas; Nikos I. Karacapilidis; Yannis Charalabidis; Zoi Lachana; Charalampos Alexopoulos; Theodoros Papadopoulos; Georgios Karamanolis; Michail Psalidas (EMCIS (1), 2023)

Chatbot Technology Assessment: 40 Cases from Greece. - Yannis Charalabidis; Thanos Anagnou; Charalampos Alexopoulos; Theodoros Papadopoulos; Zoi Lachana; Christos Bouras; Nikos I. Karacapilidis; Vasileios Kokkinos; Apostolos Gkamas (EMCIS (1), 2023)

A Structured Analysis of Domain-Specific Linked Open Vocabularies (LOV): Indicators for Interoperability and Reusability. - Maria Ioanna Maratsi; Charalampos Alexopoulos; Yannis Charalabidis (EMCIS (1), 2023)

What's in a Brand? Place Branding and Migration in Smart Cities. - Ricardo Matheus; Naveen Naval; Nina Rizun; Charalampos Alexopoulos; Raphael Gouvêa da Silva; Guilherme Wiedenhöft; Stuti Saxena (I3E, 2023)

Benchmarking Open Government Data (OGD) Curriculum in Universities. - Georgios Papageorgiou; Ricardo Matheus; Charalampos Alexopoulos; Guilherme Wiedenhöft; Euripides N. Loukis; Nina Rizun; Yannis Charalabidis; Stuti Saxena (I3E, 2023)

An algorithmic method for business process reengineering and service automation in the public sector. - Yannis Charalabidis; Zoi Lachana; Charalampos Alexopoulos; Michalis Avgerinos Loutsaris (ICEGOV, 2023)

Semantic Interoperability for Legal Information: Mapping the European Legislation Identifier (ELI) and Akoma Ntoso (AKN) Ontologies. - Michalis Avgerinos Loutsaris; Charalampos Alexopoulos; Maria Ioanna Maratsi; Yannis Charalabidis (ICEGOV, 2023)

Information scent and open government data (OGD) engagement: research agenda. - Stuti Saxena; Guilherme Wiedenhöft; Edimara M. Luciano; Charalampos Alexopoulos; Nina Rizun; Euripides N. Loukis; Ricardo Matheus (ICEGOV, 2023)

Team Radiant or Dire? Comparing the SVM and k-NN Classifiers upon a DotA2 Matches Dataset. - Maria Ioanna Maratsi; Charalampos Alexopoulos; Yannis Charalabidis (PCI, 2023)

A functional and semantic analysis of artifact representation schemata in folklore museum websites. - Maria Ioanna Maratsi; Zoi Lachana; Charalampos Alexopoulos; Yannis Charalabidis (Int. J. Metadata Semant. Ontologies, 2023)

Barriers towards Open Government Data Value Co-Creation: An empirical investigation. - Guilherme Costa Wiedenhöft; Ricardo Matheus; Stuti Saxena; Charalampos Alexopoulos (Electron. J. Inf. Syst. Dev. Ctries., 2023)

Assessing the failure of Open Government Data initiatives in Brazil. - Guilherme Costa Wiedenhöft; Charalampos Alexopoulos; Stuti Saxena; Nina Rizun; Ricardo Matheus (Electron. J. Inf. Syst. Dev. Ctries., 2023)

Understanding the Ukrainian Migrants Challenges in the EU: A Topic Modeling Approach. - Nina Khairova; Nina Rizun; Charalampos Alexopoulos; Magdalena Ciesielska; Arsenii Lukashevskyi; Ivan Redozub (DG.O, 2024)

Towards Cross-Domain Linking of Data: A Semantic Mapping of Cultural Heritage Ontologies. - Maria Ioanna Maratsi; Umair Ahmed; Charalampos Alexopoulos; Yannis Charalabidis; Andrea Polini (DG.O, 2024)

Employment of University Graduates in the Era of Digitalization and Artificial Intelligence: Challenges and Prospects. - Nina Rizun; Halina Ryzhkova; Irena Pawlyszyn; Charalampos Alexopoulos (DG.O, 2024)

Investigating Actors and Infrastructure in Open Data Ecosystems (ODEs): A Conceptual Model. - Mohsan Ali; Shefali Virkar; Charalampos Alexopoulos; Yannis Charalabidis (EMCIS (1), 2024)

On the Semantic Analysis of Open (Government) Data Portals' Metadata Provision and Schema. - Maria Ioanna Maratsi; Charalampos Alexopoulos; Yannis Charalabidis (ICEGOV, 2024)

A Proposed Methodology for Sub-Ontology Development in Comprehensive Scientific Investigation Methods and Tooling. - Maria Ioanna Maratsi; Nina Gialoussi; Charalampos Alexopoulos; Yannis Charalabidis (MTSR, 2024)

GlossAPI: Architecturing the Greek Data Pile for LLM development. - Mohsan Ali; Nina Giallousi; Alexandros Melidis; Charalampos Alexopoulos; Yannis Charalabidis (PCI, 2024)

BRYT: Automated keyword extraction for open datasets. - Umair Ahmed; Charalampos Alexopoulos; Marco Piangerelli; Andrea Polini (Intell. Syst. Appl., 2024)

A Framework for the Multi-Dimensional Assessment of Interoperability for Open Data Ecosystems Development. - Mohsan Ali; Georgios Papageorgiou; Abdul Aziz; Euripidis N. Loukis; Yannis Charalabidis; Charalampos Alexopoulos; Francisco J. López-Pellicer (Inf. Polity, 2024)

Do personality traits influence the user's behavioral intention to adopt and use Open Government Data (OGD)? An empirical investigation. - Nina Rizun; Charalampos Alexopoulos; Stuti Saxena; Fernando Kleiman; Ricardo Matheus (Telematics Informatics, 2024)

Why do Open Government Data initiatives fail in developing countries? A root cause analysis of the most prevalent barriers and problems. - Charalampos Alexopoulos; Stuti Saxena; Marijn Janssen; Nina Rizun; Martin Lnenicka; Ricardo Matheus (Electron. J. Inf. Syst. Dev. Ctries., 2024)

Identification of Public Service Logic (PSL) and Public Service Motivation (PSM) elements in Open Government Data (OGD) initiatives. - Fredrick Ishengoma; Deo Shao; Raphael Gouvêa da Silva; Guilherme Costa Wiedenhöft; Ricardo Matheus; Charalampos Alexopoulos; Nina Rizun; Stuti Saxena (Electron. J. Inf. Syst. Dev. Ctries., 2024)

Value co-creation (VCC) and value co-destruction (VCD) via open government data (OGD): Empirical case of Tanzania. - Fredrick Ishengoma; Deo Shao; Raphael Gouvêa da Silva; Guilherme Costa Wiedenhöft; Charalampos Alexopoulos; Nina Rizun; Stuti Saxena (Electron. J. Inf. Syst. Dev. Ctries., 2024)

Do open government data (OGD) portals show signs of knowledge management (KM) practices?: an empirical investigation. - Abiola Paterne Chokki; Charalampos Alexopoulos; Ricardo Matheus; Stuti Saxena; Benoît Frénay; Benoît Vanderose (Technol. Anal. Strateg. Manag., 2024)

Towards Open Archival Linked Data (ALD): The Case of Swedish National Archives. - Maria Ioanna Maratsi; David Haskiya; Mats Berggren; Yannis Charalabidis; Charalampos Alexopoulos (ESWC (2), 2025)

Editorial: Blockchain and tokenomics for sustainable development. - Charalampos Alexopoulos; Enrico Ferro; Thomas J. Lampoltshammer (Frontiers Blockchain, 2025)