The User's View Level of the GOQL Graphical Query Language. - Euclid Keramopoulos; Philippos Pouyioutas; Tasos Ptohos (IV, 1999)

A Formal Definition of the Users View (UV) of the Graphical Object Query Language (GOQL). - Euclid Keramopoulos; Philippos Pouyioutas; Tasos Ptohos (IV, 2002)

The System Architecture of the GOQL Language. - Euclid Keramopoulos; Tasos Ptohos; Philippos Pouyioutas (Databases and Applications, 2004)

Implementation of the GOQL Language. - Euclid Keramopoulos; Philippos Pouyioutas; Tasos Ptohos (IV, 2004)

GOQL, a graphical query language for object-oriented database systems. - Euclid Keramopoulos (2004)

The GOQL Language and its Formal Specifications. - Euclid Keramopoulos; Philippos Pouyioutas; Tasos Ptohos (Int. J. Comput. Sci. Appl., 2008)

A list of features that a graphical xml query language should support. - K. Bekiropoulos; Euclid Keramopoulos; Olga Beza; P. Mouratidis (Comput. Syst. Sci. Eng., 2010)

HERMES: A Tool for Querying Heterogeneous Data Stores. - Euclid Keramopoulos; Dimitrios Dervos; Ignatios S. Deligiannis; Georgios Evangelidis 001; Philippos Pouyioutas (Panhellenic Conference on Informatics, 2012)

EGQL: a gesture query language. - Aren Memet Erkan; Euclid Keramopoulos (Panhellenic Conference on Informatics, 2015)

iGQL: An Intelligent NoSQL Graphical Query Language. - Ilias Nektarios Seitanidis; Georgios Charitakis; Euclid Keramopoulos (PCI, 2016)

Cultivation Optimization Using Augmented Reality. - Alexander Katsaros; Euclid Keramopoulos; Michail Salampasis (HAICTA, 2017)

Deriving Word Embeddings Using Multilingual Transfer Learning for Opinion Mining. - Konstantinos Stavridis; Georgia Koloniari; Euclid Keramopoulos (SEEDA-CECNSM, 2018)

Semantic Web user interfaces - A model and a review. - Charalampos C. Charalampidis; Euclid Keramopoulos (Data Knowl. Eng., 2018)

Enhancing the functionality of augmented reality using deep learning, semantic web and knowledge graphs: A review. - Georgios Lampropoulos 001; Euclid Keramopoulos; Konstantinos I. Diamantaras (Vis. Informatics, 2020)

Developing Physics Experiments Using Augmented Reality Game-Based Learning Approach: A Pilot Study in Primary School. - Maria Zafeiropoulou; Christina Volioti; Euclid Keramopoulos; Theodosios Sapounidis (Comput., 2021)

Semantically Enriched Augmented Reality Applications: A Proposed System Architecture and a Case Study. - Georgios Lampropoulos 001; Euclid Keramopoulos; Konstantinos I. Diamantaras (Int. J. Recent Contributions Eng. Sci. IT, 2022)

Using Augmented Reality in K-12 Education: An Indicative Platform for Teaching Physics. - Christina Volioti; Euclid Keramopoulos; Theodosios Sapounidis; Konstantinos Melisidis; Maria Zafeiropoulou; Charalampos Sotiriou; Vladimiros Spiridis (Inf., 2022)

Virtual Reality in Education: A Comparative Social Media Data and Sentiment Analysis Study. - Georgios Lampropoulos 001; Euclid Keramopoulos (Int. J. Recent Contributions Eng. Sci. IT, 2022)

Augmented Reality in Primary Education: An Active Learning Approach in Mathematics. - Christina Volioti; Christos Orovas; Theodosios Sapounidis; Georgios P. Trachanas; Euclid Keramopoulos (Comput., 2023)

Codeless3D: Design and Usability Evaluation of a Low-Code Tool for 3-D Game Generation. - Christina Volioti; Vasileios Martsis; Apostolos Ampatzoglou; Euclid Keramopoulos; Alexander Chatzigeorgiou (IEEE Trans. Games, 2025)