@article{Ior:06b,
  journal = {J. Mult.-Valued Logic Soft Comput.},
  volume = {12},
  title = {Classes of pseudo-{BCK} algebras. {II}},
  year = {2006},
  fjournal = {Journal of Multiple-Valued Logic and Soft Computing},
  pages = {575--629},
  number = {5-6},
  author = {Iorgulescu, Afrodita},
}