@article{MZ_1922__12_167680,
     author = {P. Herglotz},
     title = {\"Uber einen {Dirichletschen} {Satz}},
     journal = {Mathematische Zeitschrift},
     pages = {255--261},
     publisher = {mathdoc},
     volume = {12},
     year = {1922},
     zbl = {48.0170.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1922__12_167680/}
}