G. ter Hofte, и I. Mulder. Proceedings of the Computer Supported Collaborative Work Conference CSCW'04, Workshop on Social Networks, Chicago, U.S.A., (2004)
F. Viegas, и J. Donath. Proceedings of the Computer Supported Collaborative Work Conference CSCW'04, Workshop on Social Networks, Chicago, U.S.A., (2004)
P. Chen, B. Thalheim, и L. Wong. Selected Papers from the Symposium on Conceptual Modeling, Current Issues and Future Directions, том 1565 из Lecture Notes In Computer Science, Springer Publishing Berlin Heidelberg, (1999)
R. Schuette, и T. Rotthowe. ER '98: Proceedings of the 17th International Conference on Conceptual Modeling, стр. 240--254. London, UK, Springer-Verlag, (1998)