Development of an emission inventory system from transport in Greece. - Panagiotis Symeonidis; Ioannis Ziomas; Athena Proyou (Environ. Model. Softw., 2004)

Collaborative Filtering Based on User Trends. - Panagiotis Symeonidis; Alexandros Nanopoulos; Apostolos Papadopoulos; Yannis Manolopoulos (GfKl, 2006)

Collaborative Filtering Process in a Whole New Light. - Panagiotis Symeonidis; Alexandros Nanopoulos; Apostolos Papadopoulos; Yannis Manolopoulos (IDEAS, 2006)

Nearest-Biclusters Collaborative Filtering with Constant Values. - Panagiotis Symeonidis; Alexandros Nanopoulos; Apostolos Papadopoulos; Yannis Manolopoulos (WEBKDD, 2006)

Content-based Dimensionality Reduction for Recommender Systems. - Panagiotis Symeonidis (GfKl, 2007)

Feature-Weighted User Model for Recommender Systems. - Panagiotis Symeonidis; Alexandros Nanopoulos; Yannis Manolopoulos (User Modeling, 2007)

Ternary Semantic Analysis of Social Tags for Personalized Music Recommendation. - Panagiotis Symeonidis; Maria M. Ruxanda; Alexandros Nanopoulos; Yannis Manolopoulos (ISMIR, 2008)

Tag recommendations based on tensor dimensionality reduction. - Panagiotis Symeonidis; Alexandros Nanopoulos; Yannis Manolopoulos (RecSys, 2008)

Collaborative recommender systems: Combining effectiveness and efficiency. - Panagiotis Symeonidis; Alexandros Nanopoulos; Apostolos N. Papadopoulos; Yannis Manolopoulos (Expert Syst. Appl., 2008)

Nearest-biclusters collaborative filtering based on constant and coherent values. - Panagiotis Symeonidis; Alexandros Nanopoulos; Apostolos N. Papadopoulos; Yannis Manolopoulos (Inf. Retr., 2008)

Providing Justifications in Recommender Systems. - Panagiotis Symeonidis; Alexandros Nanopoulos; Yannis Manolopoulos (IEEE Trans. Syst. Man Cybern. Part A, 2008)

User Recommendations based on Tensor Dimensionality Reduction. - Panagiotis Symeonidis (AIAI, 2009)

MoviExplain: a recommender system with explanations. - Panagiotis Symeonidis; Alexandros Nanopoulos; Yannis Manolopoulos (RecSys, 2009)

Transitive node similarity for link prediction in social networks with positive and negative links. - Panagiotis Symeonidis; Eleftherios Tiakas; Yannis Manolopoulos (RecSys, 2010)

"YouTube Debate": A New Era of Internetized Television Politics? - Anastasia Deligiaouri; Panagiotis Symeonidis (Int. J. E Politics, 2010)

MusicBox: Personalized Music Recommendation Based on Cubic Analysis of Social Tags. - Alexandros Nanopoulos; Dimitrios Rafailidis; Panagiotis Symeonidis; Yannis Manolopoulos (IEEE Trans. Speech Audio Process., 2010)

A Unified Framework for Providing Recommendations in Social Tagging Systems Based on Ternary Semantic Analysis. - Panagiotis Symeonidis; Alexandros Nanopoulos; Yannis Manolopoulos (IEEE Trans. Knowl. Data Eng., 2010)

Friendlink: Link prediction in social networks via bounded local path traversal. - Alexis Papadimitriou; Panagiotis Symeonidis; Yannis Manolopoulos (CASoN, 2011)

Geo-social recommendations based on incremental tensor reduction and local path traversal. - Panagiotis Symeonidis; Alexis Papadimitriou; Yannis Manolopoulos; Pinar Senkul; Ismail Hakki Toroslu (GIS-LBSN, 2011)

Product recommendation and rating prediction based on multi-modal social networks. - Panagiotis Symeonidis; Eleftherios Tiakas; Yannis Manolopoulos (RecSys, 2011)

Social Tagging Recommender Systems. - Leandro Balby Marinho; Alexandros Nanopoulos; Lars Schmidt-Thieme; Robert Jäschke; Andreas Hotho; Gerd Stumme; Panagiotis Symeonidis (Recommender Systems Handbook, 2011)

Recommender Systems for Social Tagging Systems. - Leandro Balby Marinho; Andreas Hotho; Robert Jäschke; Alexandros Nanopoulos; Steffen Rendle; Lars Schmidt-Thieme; Gerd Stumme; Panagiotis Symeonidis (Springer, 2012)

Text Classification by Aggregation of SVD Eigenvectors. - Panagiotis Symeonidis; Ivaylo Kehayov; Yannis Manolopoulos (ADBIS, 2012)

Geo-activity recommendations by using improved feature combination. - Masoud Sattari; Murat Manguoglu; Ismail H. Toroslu; Panagiotis Symeonidis; Pinar Senkul; Yannis Manolopoulos (UbiComp, 2012)

Scalable Link Prediction in Social Networks Based on Local Graph Characteristics. - Alexis Papadimitriou; Panagiotis Symeonidis; Yannis Manolopoulos (ITNG, 2012)

A generalized taxonomy of explanations styles for traditional and social recommender systems. - Alexis Papadimitriou; Panagiotis Symeonidis; Yannis Manolopoulos (Data Min. Knowl. Discov., 2012)

AMFIC-WSDB: A web database for hosting and easy retrieval of atmospheric data from satellites. - Aristeidis K. Georgoulias; Konstantinos A. Kourtidis; Evangelos Kosmidis; T. Despotakis; Panagiotis Symeonidis (Comput. Geosci., 2012)

Fast and accurate link prediction in social networking systems. - Alexis Papadimitriou; Panagiotis Symeonidis; Yannis Manolopoulos (J. Syst. Softw., 2012)

GeoSocialRec: Explaining Recommendations in Location-Based Social Networks. - Panagiotis Symeonidis; Antonis Krinis; Yannis Manolopoulos (ADBIS, 2013)

New perspectives for recommendations in location-based social networks: time, privacy and explainability. - Pavlos Kefalas; Panagiotis Symeonidis; Yannis Manolopoulos (MEDES, 2013)

From biological to social networks: Link prediction based on multi-way spectral clustering. - Panagiotis Symeonidis; Nantia D. Iakovidou; Nikolaos Mantas; Yannis Manolopoulos (Data Knowl. Eng., 2013)

A unified framework for link and rating prediction in multi-modal social networks. - Panagiotis Symeonidis; Eleftherios Tiakas; Yannis Manolopoulos (Int. J. Soc. Netw. Min., 2013)

Corporate dividend Policy Determinants: Intelligent versus a Traditional Approach. - Pantelis Longinidis; Panagiotis Symeonidis (Intell. Syst. Account. Finance Manag., 2013)

Spectral clustering for link prediction in social networks with positive and negative links. - Panagiotis Symeonidis; Nikolaos Mantas (Soc. Netw. Anal. Min., 2013)

Link Prediction in Multi-modal Social Networks. - Panagiotis Symeonidis; Christos Perentis (ECML/PKDD (3), 2014)

xStreams: Recommending Items to Users with Time-evolving Preferences. - Zaigham Faraz Siddiqui; Eleftherios Tiakas; Panagiotis Symeonidis; Myra Spiliopoulou; Yannis Manolopoulos (WIMS, 2014)

Transitive node similarity: predicting and recommending links in signed social networks. - Panagiotis Symeonidis; Eleftherios Tiakas (World Wide Web, 2014)

Recommender Systems for Location-based Social Networks - Panagiotis Symeonidis; Dimitrios Ntempos; Yannis Manolopoulos (Springer, 2014)

Recommending Friends and Locations over a Heterogeneous Spatio-Temporal Graph. - Pavlos Kefalas; Panagiotis Symeonidis (MEDI, 2015)

Learning Relational User Profiles and Recommending Items as Their Preferences Change. - Zaigham Faraz Siddiqui; Eleftherios Tiakas; Panagiotis Symeonidis; Myra Spiliopoulou; Yannis Manolopoulos (Int. J. Artif. Intell. Tools, 2015)

Extended feature combination model for recommendations in location-based mobile services. - Masoud Sattari; Ismail Hakki Toroslu; Pinar Karagoz; Panagiotis Symeonidis; Yannis Manolopoulos (Knowl. Inf. Syst., 2015)

Matrix and Tensor Decomposition in Recommender Systems. - Panagiotis Symeonidis (RecSys, 2016)

MoocRec.com : Massive Open Online Courses Recommender System. - Panagiotis Symeonidis; Dimitrios Malakoudis (RecSys Posters, 2016)

A Graph-Based Taxonomy of Recommendation Algorithms and Systems in LBSNs. - Pavlos Kefalas; Panagiotis Symeonidis; Yannis Manolopoulos (IEEE Trans. Knowl. Data Eng., 2016)

ClustHOSVD: Item Recommendation by Combining Semantically Enhanced Tag Clustering With Tensor HOSVD. - Panagiotis Symeonidis (IEEE Trans. Syst. Man Cybern. Syst., 2016)

Matrix and Tensor Factorization Techniques for Recommender Systems - Panagiotis Symeonidis; Andreas Zioupos (Springer, 2016)

Reproducing and Prototyping Recommender Systems in R. - Ludovik Çoba; Panagiotis Symeonidis; Markus Zanker (IIR, 2017)

Visual Analysis of Recommendation Performance. - Ludovik Çoba; Panagiotis Symeonidis; Markus Zanker (RecSys, 2017)

CheckInShop.eu: A Sensor-based Recommender System for micro-location Marketing. - Panagiotis Symeonidis; Stergios Chairistanidis (RecSys, 2017)

MoocRec.com: Massive Open Online Courses Recommender System. - Panagiotis Symeonidis; Dimitrios Malakoudis (Collaborative Recommendations, 2018)

Novelty-Aware Matrix Factorization Based on Items' Popularity. - Ludovik Coba; Panagiotis Symeonidis; Markus Zanker (AI*IA, 2018)

Exploring Users' Perception of Rating Summary Statistics. - Ludovik Coba; Markus Zanker; Laurens Rook; Panagiotis Symeonidis (UMAP, 2018)

Exploring Users' Perception of Collaborative Explanation Styles. - Ludovik Coba; Markus Zanker; Laurens Rook; Panagiotis Symeonidis (CBI (1), 2018)

Replicating and Improving Top-N Recommendations in Open Source Packages. - Ludovik Coba; Panagiotis Symeonidis; Markus Zanker (WIMS, 2018)

Session-based News Recommendations. - Gabriele Sottocornola; Panagiotis Symeonidis; Markus Zanker (WWW (Companion Volume), 2018)

Decision Making of Maximizers and Satisficers Based on Collaborative Explanations. - Ludovik Coba; Markus Zanker; Laurens Rook; Panagiotis Symeonidis (CoRR, 2018)

Recommendations based on a heterogeneous spatio-temporal social network. - Pavlos Kefalas; Panagiotis Symeonidis; Yannis Manolopoulos (World Wide Web, 2018)

Decision making strategies differ in the presence of collaborative explanations: two conjoint studies. - Ludovik Coba; Laurens Rook; Markus Zanker; Panagiotis Symeonidis (IUI, 2019)

PDMFRec: a decentralised matrix factorisation with tunable user-centric privacy. - Erika Duriakova; Elias Z. Tragos; Barry Smyth; Neil Hurley; Francisco J. Peña; Panagiotis Symeonidis; James Geraci; Aonghus Lawlor (RecSys, 2019)

Personalised novel and explainable matrix factorisation. - Ludovik Coba; Panagiotis Symeonidis; Markus Zanker (Data Knowl. Eng., 2019)

Development of a spatial database and web-GIS for the climate of Greece. - Michail Vaitis; Haralambos Feidas; Panagiotis Symeonidis; Vasilis Kopsachilis; Dimitris Dalaperas; Nikoletta Koukourouvli; Dimitris Simos; Symeon Taskaris (Earth Sci. Informatics, 2019)

Multi-modal matrix factorization with side information for recommending massive open online courses. - Panagiotis Symeonidis; Dimitrios Malakoudis (Expert Syst. Appl., 2019)

Counteracting the filter bubble in recommender systems: Novelty-aware matrix factorization. - Panagiotis Symeonidis; Ludovik Coba; Markus Zanker (Intelligenza Artificiale, 2019)

Improving Time-Aware Recommendations in Open Source Packages. - Panagiotis Symeonidis; Ludovik Coba; Markus Zanker (Int. J. Artif. Intell. Tools, 2019)

OmniRank: learning to recommend based on omni-traversal of heterogeneous graphs. - Panagiotis Symeonidis; Stergios Chairistanidis (Soc. Netw. Anal. Min., 2019)

ThermiAir: an innovative air quality monitoring system for airborne particulate matter in Thermi, Greece. - Panagiotis Symeonidis; Pantelis Mitropoulos; Simeon Taskaris; Theodoros Vakkas; Eleni Adamopoulou; Dimitrios Karakirios; Vasileios Salamalikis; Georgios Kosmopoulos; Andreas Kazantzidis (ICEGOV, 2020)

Recommending the Video to Watch Next: An Offline and Online Evaluation at YOUTV.de. - Panagiotis Symeonidis; Andrea Janes; Dmitry Chaltsev; Philip Giuliani; Daniel Morandini; Andreas Unterhuber; Ludovik Coba; Markus Zanker (RecSys, 2020)

MP4Rec: Explainable and Accurate Top-N Recommendations in Heterogeneous Information Networks. - Makbule Gulcin Ozsoy; Diarmuid O'Reilly-Morgan; Panagiotis Symeonidis; Elias Z. Tragos; Neil Hurley; Barry Smyth; Aonghus Lawlor (IEEE Access, 2020)

Session-aware news recommendations using random walks on time-evolving heterogeneous information networks. - Panagiotis Symeonidis; Lidija Kirjackaja; Markus Zanker (User Model. User Adapt. Interact., 2020)

Treatment Recommendations for COVID-19 Patients along with Robust Explanations. - Panagiotis Symeonidis; Christos Andras; Markus Zanker (CBMS, 2021)

Recommending What Drug to Prescribe Next for Accurate and Explainable Medical Decisions. - Panagiotis Symeonidis; Stergios Chairistanidis; Markus Zanker (CBMS, 2021)

News Recommendations by Combining Intra-session with Inter-session and Content-Based Probabilistic Modelling. - Panagiotis Symeonidis; Dmitry Chaltsev; Markus Zanker; Yannis Manolopoulos (ICCCI, 2021)

Similarity Search, Recommendation and Explainability over Graphs in Different Domains: Social Media, News, and Health Industry. - Panagiotis Symeonidis (ICWE, 2021)

An overlapping clustering approach for precision, diversity and novelty-aware recommendations. - ChemsEddine Berbague; Nour El Islem Karabadji; Hassina Seridi; Panagiotis Symeonidis; Yannis Manolopoulos; Wajdi Dhifli (Expert Syst. Appl., 2021)

Session-based news recommendations using SimRank on multi-modal graphs. - Panagiotis Symeonidis; Lidija Kirjackaja; Markus Zanker (Expert Syst. Appl., 2021)

Deep Reinforcement Learning for Medicine Recommendation. - Panagiotis Symeonidis; Stergios Chairistanidis; Markus Zanker (BIBE, 2022)

Mortality Prediction and Safe Drug Recommendation for Critically-ill Patients. - Panagiotis Symeonidis; Theodoros Kostoulas; Vasiliki Danilatou; Christos Andras; Stergios Chairistanidis (BIBE, 2022)

Session-Based Recommendation Along with the Session Style of Explanation. - Panagiotis Symeonidis; Lidija Kirjackaja; Markus Zanker (ECML/PKDD (1), 2022)

An evolutionary-based approach for providing accurate and novel recommendations. - ChemsEddine Berbague; Hassina Seridi-Bouchelaghem; Nour El Islem Karabadji; Panagiotis Symeonidis; Markus Zanker (Int. J. Bus. Intell. Data Min., 2022)

Sequence-aware news recommendations by combining intra- with inter-session user information. - Panagiotis Symeonidis; Dmitry Chaltsev; ChemsEddine Berbague; Markus Zanker (Inf. Retr. J., 2022)

JIIS preface for the special issue on advances in recommender systems. - Yong Zheng 001; Li Chen 009; Markus Zanker; Panagiotis Symeonidis (J. Intell. Inf. Syst., 2022)

Safe, effective and explainable drug recommendation based on medical data integration. - Panagiotis Symeonidis; Stergios Chairistanidis; Markus Zanker (User Model. User Adapt. Interact., 2022)

Safe and Effective Recommendation of Drug Combinations based on Matrix Co-Factorization. - Panagiotis Symeonidis; Luca Bellinazzi; ChemsEddine Berbague; Markus Zanker (CBMS, 2023)

Accurate and Safe Drug Recommendations based on Singular Value Decomposition. - Panagiotis Symeonidis; Grigorios Manitaras; Markus Zanker (CBMS, 2023)

Employing deep learning framework for improving solar panel defects using drone imagery. - G. Terzoglou; M. Loufakis; Panagiotis Symeonidis; Dimosthenis Ioannidis; Dimitrios Tzovaras (DSP, 2023)

Deep Recommendation using Graphs. - Panagiotis Symeonidis (RecSys, 2024)

Individual Fairness in Algorithmic Hiring. - Stavros Davidopoulos; Panagiotis Symeonidis; Dimitris Sacharidis (EWAF, 2025)