Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_5_a4, author = {V. S. Klimov}, title = {Non-zero solutions of boundary value problems}, journal = {Differencialʹnye uravneni\^a}, pages = {807--813}, publisher = {mathdoc}, volume = {7}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_5_a4/} }
V. S. Klimov. Non-zero solutions of boundary value problems. Differencialʹnye uravneniâ, Tome 7 (1971) no. 5, pp. 807-813. http://geodesic.mathdoc.fr/item/DE_1971_7_5_a4/