@article{MAN_1883__21_157075,
     author = {Sturm},
     title = {Ueber den integrirenden {Factor} der elliptischen {Differentialgleichung} .},
     journal = {Mathematische Annalen},
     pages = {446--453},
     publisher = {mathdoc},
     volume = {21},
     year = {1883},
     url = {http://geodesic.mathdoc.fr/item/MAN_1883__21_157075/}
}