@article{DAN_1961_138_2_a9,
     author = {S. N. Mergelyan},
     title = {Certain classes of sets and their applications},
     journal = {Doklady Akademii Nauk},
     pages = {285--288},
     publisher = {mathdoc},
     volume = {138},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_138_2_a9/}
}