@article{Rud:80,
  journal = {An. \c Stiin\c t. Univ. ``Al. I. Cuza'' Ia\c si Sec\c t. I a Mat.
             (N.S.)},
  volume = {26},
  title = {Fix points of lattice and {B}oolean transformation},
  year = {1980},
  fjournal = {Analele \c Stiin\c tifice ale Universit\u a\c tii ``Al. I. Cuza''
              din Ia\c si. Seria Nou\u a. Sec\c tiunea I a Matematic\u a},
  pages = {147--153},
  number = {1},
  author = {Rudeanu, Sergiu},
}