@article{Ior:04,
  journal = {Sci. Math. Jpn.},
  volume = {60},
  title = {On pseudo-{BCK} algebras and porims},
  year = {2004},
  fjournal = {Scientiae Mathematicae Japonicae},
  pages = {501--513},
  number = {3},
  author = {Iorgulescu, Afrodita},
}