Computing and Managing Cardinal Direction Relations. - Spiros Skiadopoulos; Christos Giannoukos; Nikos Sarkas; Panos Vassiliadis; Timos K. Sellis; Manolis Koubarakis (IEEE Trans. Knowl. Data Eng., 2005)

Ad-hoc Top-k Query Answering for Data Streams. - Gautam Das 001; Dimitrios Gunopulos; Nick Koudas; Nikos Sarkas (VLDB, 2007)

A Family of Directional Relation Models for Extended Objects. - Spiros Skiadopoulos; Nikos Sarkas; Timos K. Sellis; Manolis Koubarakis (IEEE Trans. Knowl. Data Eng., 2007)

Correction to "A Family of Directional Relation Models for Extended Objects". - Spiros Skiadopoulos; Nikos Sarkas; Timos K. Sellis; Manolis Koubarakis (IEEE Trans. Knowl. Data Eng., 2007)

Categorical skylines for streaming data. - Nikos Sarkas; Gautam Das 001; Nick Koudas; Anthony K. H. Tung (SIGMOD Conference, 2008)

What's on the grapevine? - Albert Angel; Nick Koudas; Nikos Sarkas; Divesh Srivastava (SIGMOD Conference, 2009)

Measure-driven Keyword-Query Expansion. - Nikos Sarkas; Nilesh Bansal; Gautam Das 001; Nick Koudas (Proc. VLDB Endow., 2009)

Improved Search for Socially Annotated Data. - Nikos Sarkas; Gautam Das 001; Nick Koudas (Proc. VLDB Endow., 2009)

Efficient identification of coupled entities in document collections. - Nikos Sarkas; Albert Angel; Nick Koudas; Divesh Srivastava (ICDE, 2010)

Structured annotations of web queries. - Nikos Sarkas; Stelios Paparizos; Panayiotis Tsaparas (SIGMOD Conference, 2010)

Querying, Exploring and Mining the Extended Document. - Nikos Sarkas (2011)

Dense Subgraph Maintenance under Streaming Edge Weight Updates for Real-time Story Identification. - Albert Angel; Nick Koudas; Nikos Sarkas; Divesh Srivastava (Proc. VLDB Endow., 2012)

Dense subgraph maintenance under streaming edge weight updates for real-time story identification. - Albert Angel; Nick Koudas; Nikos Sarkas; Divesh Srivastava; Michael Svendsen; Srikanta Tirthapura (VLDB J., 2014)