@article{GDZPPN002371766,
title = {Zum Sturm-Liouvilleschen Problem},
journal = {Mathematische Zeitschrift},
volume = {32},
year = {1930},
pages = {346-349},
zbl = {55.0259.02},
url = {http://dml.mathdoc.fr/item/GDZPPN002371766}
}
Lichtenstein, L. Zum Sturm-Liouvilleschen Problem. Mathematische Zeitschrift, Tome 32 (1930) pp. 346-349. http://gdmltest.u-ga.fr/item/GDZPPN002371766/