Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1951__6_140565, author = {H. Sch\"uepp}, title = {Die graphische {L\"osung} des {Doppelsternproblems.}}, journal = {Elemente der Mathematik}, pages = {33--38}, publisher = {mathdoc}, volume = {6}, year = {1951}, zbl = {0044.45402}, url = {http://geodesic.mathdoc.fr/item/ELMA_1951__6_140565/} }
H. Schüepp. Die graphische Lösung des Doppelsternproblems.. Elemente der Mathematik, Tome 6 (1951), pp. 33-38. http://geodesic.mathdoc.fr/item/ELMA_1951__6_140565/