Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_8_a10, author = {V. M. Gershtein}, title = {The dissipativity of a certain two-dimensional system}, journal = {Differencialʹnye uravneni\^a}, pages = {1438--1444}, publisher = {mathdoc}, volume = {5}, number = {8}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_8_a10/} }
V. M. Gershtein. The dissipativity of a certain two-dimensional system. Differencialʹnye uravneniâ, Tome 5 (1969) no. 8, pp. 1438-1444. http://geodesic.mathdoc.fr/item/DE_1969_5_8_a10/