1. Functional constructions in k-valued logics (in Russian);Jablonskij;Tr. Mat. Inst. Steklova,1958
2. La structure des fonctions de plusieurs variables sur un ensemble fini;Rosenberg;C. R. Acad. Sci. Paris,1965
3. Completeness in finite algebras with a single operation;Rousseau;Proc. Amer. Math. Soc.,1967