@article{GDZPPN002274019,
title = {A generalization of the Sturm. Separation und Comparison Theorems in n-space},
journal = {Mathematische Annalen},
volume = {102},
year = {1930},
pages = {52-69},
zbl = {56.1078.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002274019}
}
Morse, M. A generalization of the Sturm. Separation und Comparison Theorems in n-space. Mathematische Annalen, Tome 102 (1930) pp. 52-69. http://gdmltest.u-ga.fr/item/GDZPPN002274019/