@article{DAN_1973_211_1_a2,
     author = {F. G. Avkhadiev and L. A. Aksent'ev},
     title = {The subordination principle in sufficient conditions for univalence},
     journal = {Doklady Akademii Nauk},
     pages = {19--22},
     publisher = {mathdoc},
     volume = {211},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_211_1_a2/}
}