@article{DAN_1979_244_1_a2,
     author = {K. Kh. Boimatov},
     title = {Pseudodifferential operators with an operator symbol},
     journal = {Doklady Akademii Nauk},
     pages = {20--23},
     publisher = {mathdoc},
     volume = {244},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_244_1_a2/}
}