Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1987_23_11_a19, author = {A. V. Kozulin}, title = {A third order differential equation with six singular points}, journal = {Differencialʹnye uravneni\^a}, pages = {1997--1998}, publisher = {mathdoc}, volume = {23}, number = {11}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_11_a19/} }
A. V. Kozulin. A third order differential equation with six singular points. Differencialʹnye uravneniâ, Tome 23 (1987) no. 11, pp. 1997-1998. http://geodesic.mathdoc.fr/item/DE_1987_23_11_a19/