TY - JOUR AU - M. F. Kotsur TI - Radii of starlikeness and convexity in certain classes of analytic functions in the disk JO - Matematičeskie zametki PY - 1979 SP - 675 EP - 680 VL - 25 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1979_25_5_a4/ LA - ru ID - MZM_1979_25_5_a4 ER -