Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1990_26_1_a19, author = {M. M. Zainulabidov}, title = {The {Riquier--Tricomi} problem for a disk}, journal = {Differencialʹnye uravneni\^a}, pages = {157--160}, publisher = {mathdoc}, volume = {26}, number = {1}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_1_a19/} }
M. M. Zainulabidov. The Riquier--Tricomi problem for a disk. Differencialʹnye uravneniâ, Tome 26 (1990) no. 1, pp. 157-160. http://geodesic.mathdoc.fr/item/DE_1990_26_1_a19/