Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_2_a5, author = {V. N. Laptinskii}, title = {Linear differential systems}, journal = {Differencialʹnye uravneni\^a}, pages = {249--253}, publisher = {mathdoc}, volume = {8}, number = {2}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_2_a5/} }
V. N. Laptinskii. Linear differential systems. Differencialʹnye uravneniâ, Tome 8 (1972) no. 2, pp. 249-253. http://geodesic.mathdoc.fr/item/DE_1972_8_2_a5/