@article{JMLR:v6:binev05a,
  author  = {Peter Binev and Albert Cohen and Wolfgang Dahmen and Ronald DeVore and Vladimir Temlyakov},
  title   = {Universal Algorithms for Learning Theory Part I : Piecewise Constant Functions},
  journal = {Journal of Machine Learning Research},
  year    = {2005},
  volume  = {6},
  number  = {44},
  pages   = {1297--1321},
  url     = {http://jmlr.org/papers/v6/binev05a.html}
}