@article{DAN_1981_261_6_a4,
     author = {B. A. Plamenevskii and V. N. Senichkin},
     title = {On the spectrum of $C^*$-algebras generated by pseudodifferential operators with isolated singularities of symbols},
     journal = {Doklady Akademii Nauk},
     pages = {1304--1306},
     publisher = {mathdoc},
     volume = {261},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_6_a4/}
}