@article{DE_1971_7_7_a1,
     author = {M. I. Alekseenko and A. Ya. Khokhryakov},
     title = {A function of the boundary value conditions and estimation of the {Green's} function of a periodic problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1158--1170},
     publisher = {mathdoc},
     volume = {7},
     number = {7},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_7_a1/}
}