@article{DE_1969_5_4_a2,
     author = {P. B. Golokvoschyus},
     title = {The integral matrix of a certain system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {626--640},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_4_a2/}
}