Rómer Rosales Brendan J. Frey Learning Generative Models of Similarity Matrices. 485-492 2003 conf/uai/2003 UAI db/conf/uai/uai2003.html#RosalesF03 http://uai.sis.pitt.edu/displayArticleDetails.jsp?mmnu=1&smnu=2&article_id=965&proceeding_id=19