@inproceedings{norelljansson2003:PolyHaskell,
  author =	 {Ulf Norell and Patrik Jansson},
  title =	 {Polytypic Programming in {Haskell}},
  note =	 {In press. Presented at IFL'03},
  booktitle =    {Implementation of Functional Languages},
  series =	 LNCS,
  year =	 2004,
  url =          {http://www.cs.chalmers.se/~ulfn/papers/polyhaskell.ps}
}