@article{SM_1968_6_2_a4,
     author = {B. A. Plamenevskii and M. \`E. Yudovin},
     title = {The first boundary value problem for convolution operators in cones},
     journal = {Sbornik. Mathematics},
     pages = {205--232},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_2_a4/}
}