@article{MAN_1904__58_158140,
     author = {E. Zermelo},
     title = {\"Uber die {Herleitung} der {Differentialgleichung} bei {Variationsproblemen}},
     journal = {Mathematische Annalen},
     pages = {558--564},
     publisher = {mathdoc},
     volume = {58},
     year = {1904},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1904__58_158140/}
}