Voir la notice de l'article provenant de la source European Digital Mathematics Library
@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/} }
J.O. Fleckenstein. Notiz zur Lagrangeschen Lösung des Keplerschen Problems.. Commentarii mathematici Helvetici, Tome 13 (1940), pp. 83-89. http://geodesic.mathdoc.fr/item/CMH_1940__13_138762/