Andrew Smith and Miles Osborne. Diversity in Logarithmic Opinion Pools . Lingvisticae Investigationes (30.1), 27 -- 47, July 2007. This article includes details on co-operative training of LOPs (ie globally training all of the component models together).
Andrew Smith and Miles Osborne. Using Gazetteers in Discriminative Information Extraction . CoNLL, New York, USA, 2006.
Trevor Cohn, Andrew Smith and Miles Osborne. Scaling Conditional Random Fields using Error-Correcting Codes. ACL, Ann Arbor, USA, 2005.
Andrew Smith, Trevor Cohn and Miles Osborne. Logarithmic Opinion Pools for Conditional Random Fields . ACL, Ann Arbor, USA, 2005.
Andrew Smith and Miles Osborne. Regularisation Techniques for Conditional Random Fields: Parameterised versus Parameter-free . IJCNLP, Jeju Island, Korea, 2005.Also see Hanna's MSc thesis, which was the first application of gradient-based training methods for CRFs.