Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_11_a23, author = {G. S. Krechetov}, title = {Perturbations that preserve the property of stability}, journal = {Differencialʹnye uravneni\^a}, pages = {2090--2092}, publisher = {mathdoc}, volume = {8}, number = {11}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a23/} }
G. S. Krechetov. Perturbations that preserve the property of stability. Differencialʹnye uravneniâ, Tome 8 (1972) no. 11, pp. 2090-2092. http://geodesic.mathdoc.fr/item/DE_1972_8_11_a23/