Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1966_2_3_a19, author = {N. N. Bautin}, title = {{\CYRP}{\cyri}{\cyrs}{\cyrsftsn}{\cyrm}{\cyro} {\cyrv}~{\cyrr}{\cyre}{\cyrd}{\cyra}{\cyrk}{\cyrc}{\cyri}{\cyryu}}, journal = {Differencialʹnye uravneni\^a}, pages = {436}, publisher = {mathdoc}, volume = {2}, number = {3}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1966_2_3_a19/} }
N. N. Bautin. Письмо в~редакцию. Differencialʹnye uravneniâ, Tome 2 (1966) no. 3. http://geodesic.mathdoc.fr/item/DE_1966_2_3_a19/