@misc{MAN_1923__90_159023,
     title = {Preisausschreibung.},
     journal = {Mathematische Annalen},
     pages = {152--152},
     publisher = {mathdoc},
     volume = {90},
     year = {1923},
     url = {http://geodesic.mathdoc.fr/item/MAN_1923__90_159023/}
}