@article{Rud:59b,
  journal = {Bull. Math. Soc. Sci. Math. Phys. R. P. Roumaine (N.S.)},
  volume = {3 (51)},
  title = {Boolean equations and their applications to the study of
           bridg-circuits. {I}},
  author = {Rudeanu, Sergiu},
  year = {1959},
  pages = {445--473},
}