@article{MAN_1904__58_158119,
     author = {Hans Hahn},
     title = {Bemerkungen zur {Variationsrechnung.}},
     journal = {Mathematische Annalen},
     pages = {148--168},
     publisher = {mathdoc},
     volume = {58},
     year = {1904},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1904__58_158119/}
}