@conference{mpc10,
  title = "Gradual Refinement: Blending Pattern Matching with Data Abstraction",
  author = "Meng Wang and Jeremy Gibbons and Kazutaka Matsuda and Zhenjiang Hu",
  year = "2010",
  booktitle = "Mathematics of Program Construction",
  editor = "Jules Desharnais",
  note = "See revised journal version "Refactoring Pattern Matching"",
  series = "LNCS",
  url = "http://www.comlab.ox.ac.uk/jeremy.gibbons/publications/gradual.pdf",
  volume = "6120",
  doi = "10.1007/978-3-642-13321-3_22",
}