@article{ZNSL_2000_263_a9,
     author = {L. V. Kovalev},
     title = {Estimates for conformal radius and distortion theorems for univalent functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {141--156},
     year = {2000},
     volume = {263},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_263_a9/}
}