T. George, и S. Merugu. Proceedings of the 5th IEEE Conference on Data Mining (ICDM), стр. 625-628. Los Alamitos, CA, USA, IEEE Computer Society, (2005)
S. Rendle, и L. Schmidt-Thieme. ICDM '06: Proceedings of the Sixth International Conference on Data Mining, стр. 1026--1031. Washington, DC, USA, IEEE Computer Society, (2006)