@article{DAN_1965_164_6_a4,
     author = {A. A. Korbut},
     title = {Extremal spaces},
     journal = {Doklady Akademii Nauk},
     pages = {1229--1231},
     year = {1965},
     volume = {164},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_164_6_a4/}
}