Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1967__173_161599, author = {Juan Jorge Sch\"afer}, title = {Diameter, {Perimeter,} and {Girth} of {Spheres}}, journal = {Mathematische Annalen}, pages = {59--82}, publisher = {mathdoc}, volume = {173}, year = {1967}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MAN_1967__173_161599/} }
Juan Jorge Schäfer. Diameter, Perimeter, and Girth of Spheres. Mathematische Annalen, Tome 173 (1967), pp. 59-82. http://geodesic.mathdoc.fr/item/MAN_1967__173_161599/