A. Hotho, S. Staab, и G. Stumme. Knowledge Discovery in Databases: PKDD 2003, 7th European Conference on Principles and Practice of Knowledge Discovery in Databases, том 2838 из LNAI, стр. 217-228. Heidelberg, Springer, (2003)
D. Milne, O. Medelyan, и I. Witten. ACM International Conference on Web Intelligence (WI 2006 Main Conference Proceedings)(WI'06), стр. 442--448. (2006)