C. de Souza, S. Quirk, E. Trainer, и D. Redmiles. Proceedings of the 2007 international ACM conference on Supporting group work, стр. 147--156. New York, NY, USA, ACM, (2007)
J. Howse. Proceedings of the 16th International Conference on Conceptual Structures (ICCS 2008), том 5113 из Lecture Notes in Computer Science, стр. 1-20. Springer, (2008)
M. Lungu, и M. Lanza. European Conference on Software Maintenance and Reengineering (CSMR), стр. 91--100. Amsterdam, IEEE Computer Society, (21-23 03 2007)