@article{MelRud:84b,
  journal = {Arch. Math. (Basel)},
  volume = {43},
  title = {Alternative definitions of {B}oolean functions and relations},
  year = {1984},
  fjournal = {Archiv der Mathematik},
  pages = {16--20},
  number = {1},
  author = {Melter, Robert A. and Rudeanu, Sergiu},
}