A. Hotho, S. Staab, и G. Stumme. Proceedings of the 2003 IEEE International Conference on Data Mining, стр. 541-544 (Poster. Melbourne, Florida, IEEE Computer Society, (ноября 2003)
D. Lawrie, и W. Croft. SIGIR '03: Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval, стр. 457--458. New York, NY, USA, ACM Press, (2003)
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)