Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1986__22_2_a1, author = {M\"uller-Pfeiffer, Erich}, title = {Comparison theorems for {Sturm-Liouville} equations}, journal = {Archivum mathematicum}, pages = {65--73}, publisher = {mathdoc}, volume = {22}, number = {2}, year = {1986}, mrnumber = {868121}, zbl = {0632.34029}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1986__22_2_a1/} }
Müller-Pfeiffer, Erich. Comparison theorems for Sturm-Liouville equations. Archivum mathematicum, Tome 22 (1986) no. 2, pp. 65-73. http://geodesic.mathdoc.fr/item/ARM_1986__22_2_a1/