@article{DE_1965_1_9_a6,
     author = {A. B. Vasil'eva and V. F. Butuzov},
     title = {Certain problems on eigenvalues for integro-differential equations with a small parameter coefficient for the higher derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1190--1203},
     publisher = {mathdoc},
     volume = {1},
     number = {9},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_9_a6/}
}