@article{DAN_1978_243_1_a9,
     author = {V. D. Stepanov},
     title = {On convolution integral operators},
     journal = {Doklady Akademii Nauk},
     pages = {45--48},
     publisher = {mathdoc},
     volume = {243},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_1_a9/}
}