@article{SM_1967_2_1_a6,
     author = {P. M. Tamrazov},
     title = {Some extremal problems in conformal mapping},
     journal = {Sbornik. Mathematics},
     pages = {85--109},
     year = {1967},
     volume = {2},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1967_2_1_a6/}
}