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@article{DAN_1968_180_3_a3, author = {Ya. B. Livchak}, title = {An approach to the notion of limit}, journal = {Doklady Akademii Nauk}, pages = {530--533}, publisher = {mathdoc}, volume = {180}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_3_a3/} }
Ya. B. Livchak. An approach to the notion of limit. Doklady Akademii Nauk, Tome 180 (1968) no. 3, pp. 530-533. http://geodesic.mathdoc.fr/item/DAN_1968_180_3_a3/