Cédric Archambeau Manfred Opper Yuan Shen Dan Cornford John Shawe-Taylor Variational Inference for Diffusion Processes. 2007 NIPS http://books.nips.cc/papers/files/nips20/NIPS2007_1082.pdf conf/nips/2007 db/conf/nips/nips2007.html#ArchambeauOSCS07