@article{GDZPPN002281430, title = {Das Dirichletsche Prinzip}, journal = {Mathematische Annalen}, volume = {120}, year = {1947}, pages = {36-42}, language = {en}, url = {http://dml.mathdoc.fr/item/GDZPPN002281430} }
Ahlfors, L.V. Das Dirichletsche Prinzip. Mathematische Annalen, Tome 120 (1947) pp. 36-42. http://gdmltest.u-ga.fr/item/GDZPPN002281430/