Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1997_33_5_a4, author = {I. A. Volkov}, title = {On the existence of a quasilinear system with a countable set of {Bohl} exponents}, journal = {Differencialʹnye uravneni\^a}, pages = {602--605}, publisher = {mathdoc}, volume = {33}, number = {5}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1997_33_5_a4/} }
I. A. Volkov. On the existence of a quasilinear system with a countable set of Bohl exponents. Differencialʹnye uravneniâ, Tome 33 (1997) no. 5, pp. 602-605. http://geodesic.mathdoc.fr/item/DE_1997_33_5_a4/