Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1988_24_4_a24, author = {O. M. Penkin and Yu. V. Pokornyi}, title = {On a boundary value problem on a graph}, journal = {Differencialʹnye uravneni\^a}, pages = {701--703}, publisher = {mathdoc}, volume = {24}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a24/} }
O. M. Penkin; Yu. V. Pokornyi. On a boundary value problem on a graph. Differencialʹnye uravneniâ, Tome 24 (1988) no. 4, pp. 701-703. http://geodesic.mathdoc.fr/item/DE_1988_24_4_a24/