@Inproceedings{EPTCS10.2,
  author    = {Morvan, Christophe},
  year      = {2009},
  title     = {On external presentations of infinite graphs},
  editor    = {Legay, Axel},
  booktitle = {{\rm Proceedings International Workshop on}
               Verification of Infinite-State Systems,
               {\rm Bologna, Italy, 31th August 2009}},
  series    = {Electronic Proceedings in Theoretical Computer Science},
  volume    = {10},
  publisher = {Open Publishing Association},
  pages     = {23-35},
  doi       = {10.4204/EPTCS.10.2},
}