@article{DAN_1961_136_2_a0,
     author = {S. Ya. Al'per},
     title = {Approximation of analytic functions in the mean over a region},
     journal = {Doklady Akademii Nauk},
     pages = {265--268},
     publisher = {mathdoc},
     volume = {136},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_2_a0/}
}