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@article{MAN_1970__184_161919, author = {J.J. Sch\"affer}, title = {Minimum {Girth} of {Spheres.}}, journal = {Mathematische Annalen}, pages = {169--171}, publisher = {mathdoc}, volume = {184}, year = {1970}, zbl = {0176.10803}, url = {http://geodesic.mathdoc.fr/item/MAN_1970__184_161919/} }
J.J. Schäffer. Minimum Girth of Spheres.. Mathematische Annalen, Tome 184 (1970), pp. 169-171. http://geodesic.mathdoc.fr/item/MAN_1970__184_161919/