Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_5_a12, author = {S. G. Krein and Yu. B. Savchenko}, title = {Exponential dichotomy for partial differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {835--844}, publisher = {mathdoc}, volume = {8}, number = {5}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_5_a12/} }
S. G. Krein; Yu. B. Savchenko. Exponential dichotomy for partial differential equations. Differencialʹnye uravneniâ, Tome 8 (1972) no. 5, pp. 835-844. http://geodesic.mathdoc.fr/item/DE_1972_8_5_a12/