Sherchan, W.; Loke, S. W. & Krishnaswamy, S.: A fuzzy model for reasoning about reputation in web services. Proceedings of the 2006 ACM symposium on Applied computing. New York, NY, USA: ACM, 2006SAC '06 , S. 1886-1892
[Volltext]  [BibTeX] 

Hu, M. & Liu, B.: Mining and summarizing customer reviews. Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining. New York, NY, USA: ACM, 2004KDD '04 , S. 168-177
[Volltext]  [BibTeX]