@article{Geo:79b,
  journal = {Bull. Math. Soc. Sci. Math. R. S. Roumanie (N.S.)},
  volume = {23(71)},
  title = {Modal polyadic algebras},
  year = {1979},
  fjournal = {Bulletin Math\'ematique de la Soci\'et\'e des Sciences
              Math\'ematiques de la R\'epublique Socialiste de Roumanie.
              Nouvelle S\'erie},
  pages = {49--64},
  number = {1},
  author = {Georgescu, George},
}