J. Thangavelautham, и G. D'Eleuterio. PPSN VIII: Proc. 8th Int'l Conf. on Parallel
Problem Solving from Nature, том 3242 из LNCS, стр. 991--1000. Birmingham, UK, Springer, (18-22 Sept. 2004)
K. Sia, .. J, K. Hino, Y. Chi, S. Zhu, и B. Tseng. , in Proceedings of the International Conference on Weblogs and Social Media (Boulder Colorado, March 2007),, стр. 161-168. (2007)