@article{DE_1969_5_1_a8,
     author = {R. S. Saks},
     title = {A certain class of singular integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {115--130},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_1_a8/}
}