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@article{DAN_1967_172_1_a4, author = {S. Yu. Maslov}, title = {Inverse method of establishing deducibility for non-prenex formulas of predicate calculus}, journal = {Doklady Akademii Nauk}, pages = {22--25}, publisher = {mathdoc}, volume = {172}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_172_1_a4/} }
S. Yu. Maslov. Inverse method of establishing deducibility for non-prenex formulas of predicate calculus. Doklady Akademii Nauk, Tome 172 (1967) no. 1, pp. 22-25. http://geodesic.mathdoc.fr/item/DAN_1967_172_1_a4/