@article{GDZPPN002065320, title = {A sharp four dimensional isoperimetric inequality.}, journal = {Commentarii mathematici Helvetici}, volume = {59}, year = {1984}, pages = {187-192}, zbl = {0552.53017}, url = {http://dml.mathdoc.fr/item/GDZPPN002065320} }
Croke, Christopher B. A sharp four dimensional isoperimetric inequality.. Commentarii mathematici Helvetici, Tome 59 (1984) pp. 187-192. http://gdmltest.u-ga.fr/item/GDZPPN002065320/