@article{IM2_1984_23_3_a6,
     author = {B. A. Plamenevskii and V. N. Senichkin},
     title = {On the spectrum of $C^*$-algebras generated by pseudodifferential operators with discontinuous symbols},
     journal = {Izvestiya. Mathematics },
     pages = {525--544},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_23_3_a6/}
}