@article{DE_1984_20_10_a17,
     author = {P. Olszewski},
     title = {A nonlinear boundary value problem for a system of arbitrary cardinality of second-order integro-differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1788--1799},
     publisher = {mathdoc},
     volume = {20},
     number = {10},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_10_a17/}
}