@article{SM_1970_11_3_a9,
     author = {A. I. Shnirel'man},
     title = {Convolution equations in a~halfspace},
     journal = {Sbornik. Mathematics},
     pages = {441--457},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1970_11_3_a9/}
}