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@article{DAN_1957_117_5_a3, author = {A. G. Vitushkin}, title = {The absolute $\varepsilon$-entropy of metric spaces}, journal = {Doklady Akademii Nauk}, pages = {745--747}, publisher = {mathdoc}, volume = {117}, number = {5}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_5_a3/} }
A. G. Vitushkin. The absolute $\varepsilon$-entropy of metric spaces. Doklady Akademii Nauk, Tome 117 (1957) no. 5, pp. 745-747. http://geodesic.mathdoc.fr/item/DAN_1957_117_5_a3/