@article{DE_1981_17_4_a12,
     author = {N. L. Vasilevskii},
     title = {On the theory of symbols for {Banach} algebras of operators that generalize algebras of singular integral operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {678--688},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_4_a12/}
}