@article{DAN_1962_146_2_a3,
     author = {A. I. Vinogradov},
     title = {On the class number},
     journal = {Doklady Akademii Nauk},
     pages = {274--276},
     publisher = {mathdoc},
     volume = {146},
     number = {2},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_146_2_a3/}
}