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@article{MZM_1984_35_6_a8, author = {E. S. Burgina}, title = {A step sementic system for set theory}, journal = {Matemati\v{c}eskie zametki}, pages = {855--868}, publisher = {mathdoc}, volume = {35}, number = {6}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_6_a8/} }
E. S. Burgina. A step sementic system for set theory. Matematičeskie zametki, Tome 35 (1984) no. 6, pp. 855-868. http://geodesic.mathdoc.fr/item/MZM_1984_35_6_a8/