@article{JMLR:v10:madani09a,
  author  = {Omid Madani and Michael Connor and Wiley Greiner},
  title   = {Learning When Concepts Abound},
  journal = {Journal of Machine Learning Research},
  year    = {2009},
  volume  = {10},
  number  = {89},
  pages   = {2571--2613},
  url     = {http://jmlr.org/papers/v10/madani09a.html}
}