@article{DE_1968_4_6_a10,
     author = {B. M. Arkhipov},
     title = {The {Green's} matrix of a periodic boundary value problem for a system of two second order linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1055--1064},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_6_a10/}
}