@InCollection{Elliott03:FOP,
  author       = {Conal Elliott},
  title        = {Functional Images},
  url          = {http://conal.net/papers/functional-images/},
  booktitle    = {The Fun of Programming},
  publisher    = {Palgrave},
  year         = 2003,
  series       = {``Cornerstones of Computing'' series},
  month        = mar
}