@article{14:3,author={Jaakko Riihimki and Pasi Jylnki and Aki Vehtari}, Title={Nested Expectation Propagation for Gaussian Process Classification with a Multinomial Probit Likelihood},journal={Journal of Machine Learning Research},volume={14}, url={http://www.jmlr.org/papers/volume14/riihimaki13a/riihimaki13a.pdf}}