Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1993_29_12_a4, author = {I. S. Lomov}, title = {Small denominators in the analytic theory of degenerate differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {2079--2089}, publisher = {mathdoc}, volume = {29}, number = {12}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_12_a4/} }
I. S. Lomov. Small denominators in the analytic theory of degenerate differential equations. Differencialʹnye uravneniâ, Tome 29 (1993) no. 12, pp. 2079-2089. http://geodesic.mathdoc.fr/item/DE_1993_29_12_a4/