N. Gunasekara, S. Pang, и N. Kasabov. Neural Information Processing. Models and Applications, том 6444 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2010)
K. Chen, T. Chen, G. Zheng, O. Jin, E. Yao, и Y. Yu. Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval, стр. 661--670. ACM, (2012)