S. Boytcheva, A. Strupchanska, and G. Angelova. Proceedings of the 10th International Conference on Conceptual Structures (ICCS 2002), volume 2393 of Lecture Notes in Computer Science, page 137-150. Springer, (2002)
A. Strupchanska, M. Yankova, and S. Boytcheva. Proceedings of the 11th International Conference on Conceptual Structures (ICCS 2003), volume 2746 of Lecture Notes in Computer Science, page 323-336. Springer, (2003)
S. Boytcheva, M. Yankova, and A. Strupchanska. RANLP, volume 260 of Current Issues in Linguistic Theory (CILT), page 257-266. John Benjamins, Amsterdam/Philadelphia, (2003)