@article{DE_1965_1_6_a1,
     author = {A. B. Vasil'eva},
     title = {On integral perturbations in differential equations with high frequency oscillations of the solutions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {717--730},
     publisher = {mathdoc},
     volume = {1},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_6_a1/}
}