R. Cole, and P. Eklund. Supplementary Proceedings of International Conference on Conceptual Structures, ICCS '96, page 1-12. University of New South Wales, (1996)
P. Martin. Conceptual Structures: Standards and Practice: 7th International Conference on Conceptual Graphs, 1867, page 41-54. Springer Verlag, (2000)Detailed description of the notational conventions used for knowledge engineering in WebKB-2.
R. Cole, P. Eklund, and B. Groh. International Symposium on Knowledge Retrieval, Use, and Storage for Efficiency, KRUSE-97, page 151-164. (1997)Later revised and published completely in Cole's Computational Intelligence paper.