Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1991_27_3_a1, author = {N. V. Azbelev and A. I. Domoshnitskii}, title = {On the question of linear differential inequalities. {I}}, journal = {Differencialʹnye uravneni\^a}, pages = {376--384}, publisher = {mathdoc}, volume = {27}, number = {3}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1991_27_3_a1/} }
N. V. Azbelev; A. I. Domoshnitskii. On the question of linear differential inequalities. I. Differencialʹnye uravneniâ, Tome 27 (1991) no. 3, pp. 376-384. http://geodesic.mathdoc.fr/item/DE_1991_27_3_a1/