@article{JMLR:v7:sugiyama06a,
  author  = {Masashi Sugiyama},
  title   = {Active Learning in Approximately Linear Regression Based on Conditional Expectation of Generalization Error},
  journal = {Journal of Machine Learning Research},
  year    = {2006},
  volume  = {7},
  number  = {6},
  pages   = {141--166},
  url     = {http://jmlr.org/papers/v7/sugiyama06a.html}
}