@article{DAN_1989_306_1_a10,
     author = {S. V. Yushmanov},
     title = {A general method for evaluating the metric characteristics of a},
     journal = {Doklady Akademii Nauk},
     pages = {52--54},
     publisher = {mathdoc},
     volume = {306},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_306_1_a10/}
}