@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/}
}