@inproceedings{OConnor91,
  title = {Enumerating Nondegenerate Permutations},
  author = {Luke O Connor},
  year = {1991},
  url = {http://link.springer.de/link/service/series/0558/bibs/0547/05470368.htm},
  researchr = {https://researchr.org/publication/OConnor91},
  cites = {0},
  citedby = {0},
  pages = {368-377},
  booktitle = {EUROCRYPT},
}