@article{GDZPPN002269767, title = {Sopra un teorema di R. Sturm}, journal = {Mathematische Annalen}, volume = {92}, year = {1924}, pages = {119-124}, language = {it}, url = {http://dml.mathdoc.fr/item/GDZPPN002269767} }
Sibirani, F. Sopra un teorema di R. Sturm. Mathematische Annalen, Tome 92 (1924) pp. 119-124. http://gdmltest.u-ga.fr/item/GDZPPN002269767/