@InProceedings{SalRowGhah03,
  title =	"Optimization with EM and Expectation-Conjugate-Gradient",
  author =	"Ruslan Salakhutdinov and Sam Roweis and Zoubin Ghahramani", 
  booktitle =	"Proceedings of the International Conference on Machine
                 Learning",
  year = 	"2003",
  volume =	"20",
  pages =	"672--679",
}