@article{DE_1992_28_1_a15,
     author = {Yu. G. Smirnov},
     title = {On the {Fredholm} property of a system of pseudodifferential equations in the problem of diffraction by a bounded screen},
     journal = {Differencialʹnye uravneni\^a},
     pages = {136--143},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_1_a15/}
}