@article{DBLP:journals/iandc/Barthe99,
  author    = {Gilles Barthe},
  title     = {Order-Sorted Inductive Types},
  journal   = {Inf. Comput.},
  volume    = {149},
  number    = {1},
  year      = {1999},
  pages     = {42-76},
  ee        = {http://dx.doi.org/10.1006/inco.1998.2751},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}