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@article{DAN_1971_199_1_a3, author = {V. B. Kudryavtsev}, title = {On $S$-systems of functions of $k$-valued logic}, journal = {Doklady Akademii Nauk}, pages = {20--22}, publisher = {mathdoc}, volume = {199}, number = {1}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_1_a3/} }
V. B. Kudryavtsev. On $S$-systems of functions of $k$-valued logic. Doklady Akademii Nauk, Tome 199 (1971) no. 1, pp. 20-22. http://geodesic.mathdoc.fr/item/DAN_1971_199_1_a3/