@article{MZM_1993_53_1_a14,
     author = {S. M. Yugai},
     title = {An estimate of the curvature of the images of circles under maps given by convex univalent functions in a~disk},
     journal = {Matemati\v{c}eskie zametki},
     pages = {133--137},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_1_a14/}
}