@article{GDZPPN002053144,
title = {Notiz zur Lagrangeschen L\"osung des Keplerschen Problems.},
journal = {Commentarii mathematici Helvetici},
volume = {13},
year = {1940},
pages = {83-89},
zbl = {0024.39803},
url = {http://dml.mathdoc.fr/item/GDZPPN002053144}
}
Fleckenstein, J.O. Notiz zur Lagrangeschen Lösung des Keplerschen Problems.. Commentarii mathematici Helvetici, Tome 13 (1940) pp. 83-89. http://gdmltest.u-ga.fr/item/GDZPPN002053144/