In: 3rd Conference on Formal Description of Slavic Languages (FDSL-3), December 1-3. European Conference on Formal Description of Slavic Languages (FDSL), 1999.
In: Proceedings of the European Workshop on Content-Based Multimedia Indexing (CBMI'99), October 25-27. International Workshop on Content-Based Multimedia Indexing (CBMI), Toulouse, France, Pages 75-80, 1999.
In: Proceedings of the 6th Meeting on Mathematics of Language (MOL6), July 23-25. Meeting on Mathematics of Language (MOL), Orlando, Florida, USA, Pages 143-158, 1999.