@article{DAN_1965_160_5_a6,
     author = {B. P. Kufarev and N. G. Nikulina},
     title = {Lebesgue measure of subsets of {Euclidean} space as the maximum variation of the distance function on a closed set},
     journal = {Doklady Akademii Nauk},
     pages = {1004--1006},
     publisher = {mathdoc},
     volume = {160},
     number = {5},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_160_5_a6/}
}