@article{PurBot:92a,
  journal = {Studia Univ. Babe\c s-Bolyai, Ser. Mathematica},
  volume = {37},
  title = {Power logics},
  author = {Purdea, Ioan and Both, Nicolae},
  year = 1992,
  pages = {3--7},
  number = {4},
}