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@article{DAN_1967_172_1_a0, author = {Yu. Ya. Breitbart}, title = {Essential variables of functions of the algebra of logic}, journal = {Doklady Akademii Nauk}, pages = {9--10}, publisher = {mathdoc}, volume = {172}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_172_1_a0/} }
Yu. Ya. Breitbart. Essential variables of functions of the algebra of logic. Doklady Akademii Nauk, Tome 172 (1967) no. 1, pp. 9-10. http://geodesic.mathdoc.fr/item/DAN_1967_172_1_a0/