@article{JMLR:v6:tsuda05a,
  author  = {Koji Tsuda and Gunnar R{{\"a}}tsch and Manfred K. Warmuth},
  title   = {Matrix Exponentiated Gradient Updates for On-line Learning and Bregman Projection},
  journal = {Journal of Machine Learning Research},
  year    = {2005},
  volume  = {6},
  number  = {34},
  pages   = {995--1018},
  url     = {http://jmlr.org/papers/v6/tsuda05a.html}
}