@article{MAN_1912__72_158584,
     author = {R. Courant},
     title = {\"Uber die {Methode} des {Dirichletschen} {Prinzipes.} {(Mit} 4 {Figuren} im {Text)}},
     journal = {Mathematische Annalen},
     pages = {517--550},
     publisher = {mathdoc},
     volume = {72},
     year = {1912},
     zbl = {43.0490.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1912__72_158584/}
}