@inproceedings{LoH06Ope,
  author = "L{\"o}h, Andres and Hinze, Ralf",
  booktitle = "Proceedings of the 8th ACM SIGPLAN Symposium on Principles and Practice of Declarative Programming, Venice, Italy",
  month = "jul",
  pages = "133-144",
  publisher = "ACM-Press",
  title = "Open data types and open functions",
  year = "2006",
}