B. Gutmann, и K. Kersting. Proceedings of the 15th European Conference on Machine Learning (ECML-2006), том 4212 из LNAI (Lecture Notes in Artificial Intelligence), стр. 174--185. Berlin, Germany, Springer, (сентября 2006)
Y. Zhou, L. Wu, F. Weng, и H. Schmidt. Proceedings of the 2003 conference on Empirical methods in natural language processing, стр. 153--159. Morristown, NJ, USA, Association for Computational Linguistics, (2003)
H. Han, C. Giles, E. Manavoglu, H. Zha, Z. Zhang, и E. Fox. JCDL '03: Proceedings of the 3rd ACM/IEEE-CS joint conference on Digital libraries, стр. 37--48. Washington, DC, USA, IEEE Computer Society, (2003)