@Inproceedings{EPTCS267.9,
  author    = {Villadsen, J{\o}rgen and From, Andreas Halkj{\ae}r and Schlichtkrull, Anders},
  year      = {2018},
  title     = {Natural Deduction and the Isabelle Proof Assistant},
  editor    = {Quaresma, Pedro and Neuper, Walther},
  booktitle = {{\rm Proceedings 6th International Workshop on}
               Theorem proving components for Educational software,
               {\rm Gothenburg, Sweden, 6 Aug 2017}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {267},
  publisher = {Open Publishing Association},
  pages     = {140-155},
  doi       = {10.4204/EPTCS.267.9},
}