Y. Kalfoglou, и W. Schorlemmer. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), том 3596 из Lecture Notes in Computer Science, стр. 107-118. Springer, (2005)
G. Angelova. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), том 3596 из Lecture Notes in Computer Science, стр. 367-380. Springer, (2005)