@article{Rud:75c,
  journal = {Publ. Inst. Math. (Beograd) (N.S.)},
  volume = {19 (33)},
  title = {On the range of a {B}oolean transformation},
  author = {Rudeanu, Sergiu},
  year = {1975},
  fjournal = {Institut Math\'ematique. Publications. Nouvelle S\'erie},
  pages = {139--145},
}