@article{CMH_1940__13_138762,
     author = {J.O. Fleckenstein},
     title = {Notiz zur {Lagrangeschen} {L\"osung} des {Keplerschen} {Problems.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {83--89},
     publisher = {mathdoc},
     volume = {13},
     year = {1940},
     zbl = {0024.39803},
     url = {http://geodesic.mathdoc.fr/item/CMH_1940__13_138762/}
}