@article{DE_1989_25_5_a17,
     author = {\`E. I. Grudo},
     title = {On the theory of a class of linear integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {876--884},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_5_a17/}
}