@article{MAN_1921__84_158885,
     author = {Th. P\"oschl},
     title = {Ebene {Bipotentiale,} die nur von einer {Ver\"anderlichen} abh\"angen},
     journal = {Mathematische Annalen},
     pages = {143--148},
     publisher = {mathdoc},
     volume = {84},
     year = {1921},
     zbl = {48.0565.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1921__84_158885/}
}