@article{SM_1986_55_1_a0,
     author = {A. A. Pekarskii},
     title = {Classes of analytic functions determined by best rational approximations in~$H_p$},
     journal = {Sbornik. Mathematics},
     pages = {1--18},
     year = {1986},
     volume = {55},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_55_1_a0/}
}