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S. Konstantopoulos. Computational Linguistics in the Netherlands 2002. Selected Papers from the Thirteenth CLIN Meeting., volume 47 of Language and Computers, Amsterdam, Rodopi, (2003)
S. Konstantopoulos, and G. Apostolikas. Proceedings of International IFIP Workshop of Semantic Web and Web Semantics (IFIP-SWWS 07), Algarve, 29--30 Nov. 2007, (2007)