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@article{DAN_1972_204_5_a3, author = {Yu. L. Ershov}, title = {Existence of constructivizations}, journal = {Doklady Akademii Nauk}, pages = {1041--1044}, publisher = {mathdoc}, volume = {204}, number = {5}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_5_a3/} }
Yu. L. Ershov. Existence of constructivizations. Doklady Akademii Nauk, Tome 204 (1972) no. 5, pp. 1041-1044. http://geodesic.mathdoc.fr/item/DAN_1972_204_5_a3/