@misc{SM_1971_13_4_a10,
     title = {Erratum},
     journal = {Sbornik. Mathematics},
     year = {1971},
     volume = {13},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_13_4_a10/}
}