@article{MZM_1979_25_5_a4,
     author = {M. F. Kotsur},
     title = {Radii of starlikeness and convexity in certain classes of analytic functions in the disk},
     journal = {Matemati\v{c}eskie zametki},
     pages = {675--680},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_5_a4/}
}