Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1990__26_4_a0, author = {\v{C}adek, Martin}, title = {Pointwise transformations of linear differential equations}, journal = {Archivum mathematicum}, pages = {187--200}, publisher = {mathdoc}, volume = {26}, number = {4}, year = {1990}, mrnumber = {1188970}, zbl = {0731.34008}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1990__26_4_a0/} }
Čadek, Martin. Pointwise transformations of linear differential equations. Archivum mathematicum, Tome 26 (1990) no. 4, pp. 187-200. http://geodesic.mathdoc.fr/item/ARM_1990__26_4_a0/