Real-time graph visualization tool for vehicular ad-hoc networks: (VIVAGr: VIsualization tool of VAnet graphs in real-time). - Emmanouil Spanakis; Christodoulos Efstathiades; George Pallis 001; Marios D. Dikaiakos (ISCC, 2011)

User-Contributed Relevance and Nearest Neighbor Queries. - Christodoulos Efstathiades; Dieter Pfoser (SSTD, 2013)

COLD. Revisiting Hub Labels on the Database for Large-Scale Graphs. - Alexandros Efentakis; Christodoulos Efstathiades; Dieter Pfoser (SSTD, 2015)

TwitterViz: Visualizing and Exploring the Twittersphere. - Christodoulos Efstathiades; Helias Antoniou; Dimitrios Skoutas 001; Yannis Vassiliou (SSTD, 2015)

Similarity Search on Spatio-Textual Point Sets. - Christodoulos Efstathiades; Alexandros Belesiotis; Dimitrios Skoutas 001; Dieter Pfoser (EDBT, 2016)

Efficient Processing of Relevant Nearest-Neighbor Queries. - Christodoulos Efstathiades; Alexandros Efentakis; Dieter Pfoser (ACM Trans. Spatial Algorithms Syst., 2016)

Geospatial dataspaces: location - based services and integration of user - generated content - Christodoulos Efstathiades (2016)

Hub Labels on the database for large-scale graphs with the COLD framework. - Alexandros Efentakis; Christodoulos Efstathiades; Dieter Pfoser (GeoInformatica, 2017)

Spatio-textual user matching and clustering based on set similarity joins. - Alexandros Belesiotis; Dimitrios Skoutas 001; Christodoulos Efstathiades; Vassilis Kaffes; Dieter Pfoser (VLDB J., 2018)

Technical and Social sensor aggregation for smart environment enhancement. - Aristotelis Charalampous; Andreas Papadopoulos; Christodoulos Efstathiades; Konstantinos Katzis (AFRICON, 2021)

Towards Predicting Basketball Player Positions with Transformative Insights. - Angelos Tsiannis; Christodoulos Efstathiades (Mach. Learn. Knowl. Extr., 2025)