@Inproceedings{EPTCS55.3,
  author    = {Derrick, John and North, Siobh\'an and Simons, Anthony J.H.},
  year      = {2011},
  title     = {Building a refinement checker for Z},
  editor    = {Derrick, John and Boiten, Eerke and Reeves, Steve},
  booktitle = {{\rm Proceedings 15th International}
               Refinement Workshop,
               {\rm Limerick, Ireland, 20th  June 2011}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {55},
  publisher = {Open Publishing Association},
  pages     = {37-52},
  doi       = {10.4204/EPTCS.55.3},
}