@article{11:106,author={Antti Honkela and Tapani Raiko and Mikael Kuusela and Matti Tornio and Juha Karhunen}, Title={Approximate Riemannian Conjugate Gradient Learning for Fixed-Form Variational Bayes},journal={Journal of Machine Learning Research},volume={11}, url={http://www.jmlr.org/papers/volume11/honkela10a/honkela10a.pdf}}