Gal Elidan Benjamin Packer Geremy Heitz Daphne Koller Convex Point Estimation using Undirected Bayesian Transfer Hierarchies. 179-186 2008 UAI http://uai2008.cs.helsinki.fi/UAI_camera_ready/elidan.pdf conf/uai/2008 db/conf/uai/uai2008.html#ElidanPHK08