@article{SM_1973_20_3_a6,
     author = {Yu. V. Zyuzin and V. Ya. Lin},
     title = {Unramified algebraic extensions of commutative {Banach} algebras},
     journal = {Sbornik. Mathematics},
     pages = {419--437},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_3_a6/}
}