[1] K. Petridis, D. Anastasopoulos, C. Saathoff, N. Timmermann, I. Kompatsiaris and S. Staab: “M-OntoMat-Annotizer: Image Annotation. Linking Ontologies and Multimedia Low-Level Features”, Engineered Applications of Semantic Web Session (SWEA) at the 10th International Conference on Knowledge-Based & Intelligent Information & Engineering Systems (KES 2006), Bournemouth, U.K., Oct. 2006.

[2] C. Saathoff, K. Petridis, D. Anastasopoulos, N. Timmermann, I. Kompatsiaris and S. Staab: “M-OntoMat-Annotizer: Linking Ontologies with Multimedia Low-Level Features for Automatic Image Annotation”, Demos and Posters of the 3rd European Semantic Web Conference, ESWC 2006, Budva, Montenegro, June 2006.

[3] T. Athanasiadis, V. Tzouvaras, K. Petridis, F. Precioso, Y. Avrithis and I. Kompatsiaris: “Using a Multimedia Ontology Infrastructure for Semantic Annotation of Multimedia Content”, 5th International Workshop on Knowledge Markup and Semantic Annotation (SemAnnot 2005) at the 4th International Semantic Web Conference, ISWC 2005, Galway, Ireland, Nov. 2005.

[4] K. Petridis, F. Precioso, T. Athanasiadis, Y. Avrithis and I. Kompatsiaris: “Combined Domain Specific and Multimedia Ontologies for Image Understanding”, Workshop on Mixed-reality as a Challenge to Image Understanding and Artificial Intelligence at the 28th German Conference on Artificial Intelligence, KI 2005, Koblenz, Germany, Sep. 2005.

[5] S. Bloehdorn, K. Petridis, C. Saathoff, N. Simou, V. Tzouvaras, Y. Avrithis, S. Handschuh, I. Kompatsiaris, S. Staab, and M. G. Strintzis: "Semantic Annotation of Images and Videos for Multimedia Analysis", 2nd European Semantic Web Conference, ESWC 2005, Heraklion, Greece, May 2005.

[6] K. Petridis, S. Bloehdorn, N. Simou, V. Tzouvaras, S. Handschuh, Y. Avrithis, I. Kompatsiaris, S. Staab, and M. G. Strintzis: “Knowledge Representation for Semantic Multimedia Content Analysis and Reasoning”, European Workshop on the Integration of Knowledge, Semantics and Digital Media Technology, EWIMT 2004, London, U.K., Nov.  2004.

[7] D. Palaka, P. Daras, K. Petridis, and M.G. Strintzis: “A Novel Peer-to-Peer Payment System”, International Conference on E-Business and Telecommunication Networks, ICETE 2004, Setubal, Portugal, Aug. 2004.

[8] P. Daras, D. Palaka, V. Giagourta, D. Bechtsis, K. Petridis, and M.G. Strintzis: “A novel peer-to-peer payment protocol”, International conference on computer as a Tool, IEEE EUROCON 2003, Ljubljana, Slovenia, Sep. 2003.