Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1971__7_1_a1, author = {Karim, Rahmi Ibrahim Ibrahim Abdel}, title = {On the exceptional case in systems of non-linear differential equations}, journal = {Archivum mathematicum}, pages = {9--20}, publisher = {mathdoc}, volume = {07}, number = {1}, year = {1971}, mrnumber = {0304775}, zbl = {0243.34069}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1971__7_1_a1/} }
Karim, Rahmi Ibrahim Ibrahim Abdel. On the exceptional case in systems of non-linear differential equations. Archivum mathematicum, Tome 07 (1971) no. 1, pp. 9-20. http://geodesic.mathdoc.fr/item/ARM_1971__7_1_a1/