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@article{DAN_1971_201_4_a8, author = {M. F. Ra\c{t}\u{a}}, title = {A criterion for functional completeness in the intuitionistic propositional logic}, journal = {Doklady Akademii Nauk}, pages = {794--797}, publisher = {mathdoc}, volume = {201}, number = {4}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_4_a8/} }
M. F. Raţă. A criterion for functional completeness in the intuitionistic propositional logic. Doklady Akademii Nauk, Tome 201 (1971) no. 4, pp. 794-797. http://geodesic.mathdoc.fr/item/DAN_1971_201_4_a8/