@article{MZM_1990_47_5_a9,
     author = {K. Yu. Osipenko},
     title = {Blaschke products which have the least deviation from zero},
     journal = {Matemati\v{c}eskie zametki},
     pages = {71--80},
     year = {1990},
     volume = {47},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_5_a9/}
}