Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1968_4_6_a11, author = {M. V. Zaretskii}, title = {Lagrange's differential equation}, journal = {Differencialʹnye uravneni\^a}, pages = {1065--1070}, publisher = {mathdoc}, volume = {4}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1968_4_6_a11/} }
M. V. Zaretskii. Lagrange's differential equation. Differencialʹnye uravneniâ, Tome 4 (1968) no. 6, pp. 1065-1070. http://geodesic.mathdoc.fr/item/DE_1968_4_6_a11/