Is Hyper-extensionality Preservable Under Deletions of Graph Elements?

Alberto Casagrande, Carla Piazza, Alberto Policriti. Is Hyper-extensionality Preservable Under Deletions of Graph Elements?. Electronic Notes in Theoretical Computer Science, 322:103-118, 2016. [doi]

@article{CasagrandePP16,
  title = {Is Hyper-extensionality Preservable Under Deletions of Graph Elements?},
  author = {Alberto Casagrande and Carla Piazza and Alberto Policriti},
  year = {2016},
  doi = {10.1016/j.entcs.2016.03.008},
  url = {http://dx.doi.org/10.1016/j.entcs.2016.03.008},
  researchr = {https://researchr.org/publication/CasagrandePP16},
  cites = {0},
  citedby = {0},
  journal = {Electronic Notes in Theoretical Computer Science},
  volume = {322},
  pages = {103-118},
}