Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MMO_1972_26_a6, author = {A. D. Bruno}, title = {Analytic form of differential equations}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {199--239}, publisher = {mathdoc}, volume = {26}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1972_26_a6/} }
A. D. Bruno. Analytic form of differential equations. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 26 (1972), pp. 199-239. http://geodesic.mathdoc.fr/item/MMO_1972_26_a6/