@article{DE_1990_26_11_a25,
     author = {N. G. Dokuchaev},
     title = {Solution of boundary value problems on a graph by the operational method},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2006--2008},
     publisher = {mathdoc},
     volume = {26},
     number = {11},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_11_a25/}
}