C. Plaue, T. Miller, и J. Stasko. Graphics Interface, том 62 из ACM International Conference Proceeding Series, стр. 117-126. Canadian Human-Computer Communications Society, (2004)
J. Cadiz, G. Venolia, G. Jancke, и A. Gupta. Proceedings of the ACM Conference on Computer Supported Cooperative Work (CSCW'02), стр. 314-323. ACM Press, (2002)