@article{DAN_1968_182_4_a3,
     author = {S. L. Krushkal'},
     title = {Some extremal problems for univalent analytic functions},
     journal = {Doklady Akademii Nauk},
     pages = {754--757},
     year = {1968},
     volume = {182},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_182_4_a3/}
}