Alfredo A. Kalaitzis, John D. Lafferty, Neil D. Lawrence, Shuheng Zhou. The Bigraphical Lasso. In Proceedings of the 30th International Conference on Machine Learning, ICML 2013, Atlanta, GA, USA, 16-21 June 2013. Volume 28 of JMLR Proceedings, pages 1229-1237, JMLR.org, 2013. [doi]