@article{DAN_1969_187_6_a4,
     author = {M. A. Evgrafov and M. M. Postnikov},
     title = {A certain property of the {Teichm\"uller} metric},
     journal = {Doklady Akademii Nauk},
     pages = {1229--1231},
     publisher = {mathdoc},
     volume = {187},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_187_6_a4/}
}