@article{MZ_1918__2_167489,
     author = {A. Kneser},
     title = {Kleinste {Wirkung} und {Galileische} {Relativit\"at}},
     journal = {Mathematische Zeitschrift},
     pages = {326--349},
     publisher = {mathdoc},
     volume = {2},
     year = {1918},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1918__2_167489/}
}