altenkirch-2007-observational:
  type: article
  title: Observational equality, now!
  author:
  - Altenkirch, Thorsten
  - McBride, Conor
  - Swierstra, Wouter
  date: 2007-10
  page-range: 57-68
  url: http://dx.doi.org/10.1145/1292597.1292608
  serial-number:
    doi: 10.1145/1292597.1292608
  parent:
    type: proceedings
    title: Proceedings of the 2007 workshop on Programming languages meets program verification
    publisher: ACM
    parent:
      type: proceedings
      title: ICFP07