@Inproceedings{EPTCS97.3,
  author    = {Nakazawa, Koji and Katsumata, Shin-ya},
  year      = {2012},
  title     = {Extensional Models of Untyped Lambda-mu Calculus},
  editor    = {Geuvers, Herman and de'Liguoro, Ugo},
  booktitle = {{\rm Proceedings Fourth Workshop on}
               Classical Logic and Computation,
               {\rm Warwick, England, 8th July 2012}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {97},
  publisher = {Open Publishing Association},
  pages     = {35-47},
  doi       = {10.4204/EPTCS.97.3},
}