@article{MAN_1903__56_158060,
     author = {Josef K\"ursch\'ak},
     title = {Ueber die {Transformation} der partiellen {Differentialgleichungen} der {Variationsrechnung}},
     journal = {Mathematische Annalen},
     pages = {155--164},
     publisher = {mathdoc},
     volume = {56},
     year = {1903},
     url = {http://geodesic.mathdoc.fr/item/MAN_1903__56_158060/}
}