@article{DAN_1974_218_2_a6,
     author = {I. A. Kipriyanov and L. N. Lyakhov},
     title = {On a class of pseudodifferential operators},
     journal = {Doklady Akademii Nauk},
     pages = {278--280},
     publisher = {mathdoc},
     volume = {218},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_218_2_a6/}
}