Tapani Raiko Harri Valpola Markus Harva Juha Karhunen Building Blocks for Variational Bayesian Learning of Latent Variable Models. 155-201 2007 8 Journal of Machine Learning Research http://www.jmlr.org/papers/v8/raiko07a.html db/journals/jmlr/jmlr8.html#RaikoVHK07