@article{DAN_1971_198_4_a0,
     author = {F. G. Avkhadiev and L. A. Aksent'ev},
     title = {Sufficient conditions for univalence of analytic functions},
     journal = {Doklady Akademii Nauk},
     pages = {743--746},
     publisher = {mathdoc},
     volume = {198},
     number = {4},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_4_a0/}
}