@article{DAN_1971_196_3_a1,
     author = {V. Ya. Gutlyanskii},
     title = {The stratification of a class of univalent analytic functions},
     journal = {Doklady Akademii Nauk},
     pages = {498--501},
     publisher = {mathdoc},
     volume = {196},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_196_3_a1/}
}