Kuzman Ganchev João Graça John Blitzer Ben Taskar Multi-View Learning over Structured and Non-Identical Outputs. 88-96 2008 UAI http://uai2008.cs.helsinki.fi/UAI_camera_ready/ganchev.pdf conf/uai/2008 db/conf/uai/uai2008.html#GanchevGBT08