@article{IVM_1960_2_a15,
     author = {I. V. Ostrovskii},
     title = {An estimate for the defect of a~meromorphic function for which two values are distributed inside a~certain angle},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {138--148},
     publisher = {mathdoc},
     number = {2},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1960_2_a15/}
}