@article{mileva2012quasigroup,
  title={Quasigroup Representation of Some Feistel and Generalized Feistel Ciphers}
  author={Mileva, Aleksandra and Markovski, Smile}
  journal={ICT Innovations 2012, Web Proceedings ISSN 1857-7288}
  pages={161--171}
  year={2012}
}