@article{IVM_1968_12_a0,
     author = {L. A. Aksent'ev},
     title = {An application of the principle of the argument to the study of univalence {conditions.~I}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--15},
     publisher = {mathdoc},
     number = {12},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_12_a0/}
}