@article{DE_1965_1_6_a7,
     author = {\`E. I. Grudo},
     title = {On a certain class of integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {767--772},
     publisher = {mathdoc},
     volume = {1},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_6_a7/}
}