Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_9_a2, author = {L. I. Burganskaya}, title = {Absolute stability of direct control systems in two critical cases}, journal = {Differencialʹnye uravneni\^a}, pages = {1568--1574}, publisher = {mathdoc}, volume = {7}, number = {9}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_9_a2/} }
L. I. Burganskaya. Absolute stability of direct control systems in two critical cases. Differencialʹnye uravneniâ, Tome 7 (1971) no. 9, pp. 1568-1574. http://geodesic.mathdoc.fr/item/DE_1971_7_9_a2/