@article{JMLR:v8:dekel07a,
  author  = {Ofer Dekel and Philip M. Long and Yoram Singer},
  title   = {Online Learning of Multiple Tasks with a Shared Loss},
  journal = {Journal of Machine Learning Research},
  year    = {2007},
  volume  = {8},
  number  = {75},
  pages   = {2233--2264},
  url     = {http://jmlr.org/papers/v8/dekel07a.html}
}