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@article{MZM_1989_45_5_a11, author = {A. D. Yashin}, title = {Semantic characterization of certain sets of intuitionistic logical connectives}, journal = {Matemati\v{c}eskie zametki}, pages = {103--113}, publisher = {mathdoc}, volume = {45}, number = {5}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_5_a11/} }
A. D. Yashin. Semantic characterization of certain sets of intuitionistic logical connectives. Matematičeskie zametki, Tome 45 (1989) no. 5, pp. 103-113. http://geodesic.mathdoc.fr/item/MZM_1989_45_5_a11/