Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1981_17_12_a20, author = {A. L. Teptin}, title = {On the sign of the {Green} function of a difference boundary value problem}, journal = {Differencialʹnye uravneni\^a}, pages = {2283--2286}, publisher = {mathdoc}, volume = {17}, number = {12}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1981_17_12_a20/} }
A. L. Teptin. On the sign of the Green function of a difference boundary value problem. Differencialʹnye uravneniâ, Tome 17 (1981) no. 12, pp. 2283-2286. http://geodesic.mathdoc.fr/item/DE_1981_17_12_a20/