@Inproceedings{EPTCS114.1,
  author    = {Kaufmann, Matt and Moore, J Strother},
  year      = {2013},
  title     = {Enhancements to ACL2 in Versions 5.0, 6.0, and 6.1},
  editor    = {Gamboa, Ruben and Davis, Jared},
  booktitle = {{\rm Proceedings International Workshop on the}
               ACL2 Theorem Prover and its Applications,
               {\rm Laramie, Wyoming, USA , May 30-31, 2013}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {114},
  publisher = {Open Publishing Association},
  pages     = {5-12},
  doi       = {10.4204/EPTCS.114.1},
}