@article{IM2_1976_10_2_a8,
     author = {R. V. Duduchava},
     title = {Convolution integral operators on a~quadrant with discontinuous symbols},
     journal = {Izvestiya. Mathematics },
     pages = {371--392},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1976_10_2_a8/}
}