@article{MAN_1899__52_157953,
     author = {R. von Lilienthal},
     title = {Ueber k\"urzeste {Integralcurven} einer {Pfaff'schen} {Gleichung}},
     journal = {Mathematische Annalen},
     pages = {417--432},
     publisher = {mathdoc},
     volume = {52},
     year = {1899},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1899__52_157953/}
}