@article{IM2_1973_7_3_a10,
     author = {A. B. Antonevich},
     title = {Elliptic pseudodifferential operators with a~finite group of shifts},
     journal = {Izvestiya. Mathematics },
     pages = {661--673},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1973_7_3_a10/}
}