%0 Journal Article %A Yoshie Katsurada %T On the Isoperimetric Problem in a Riemann Space. %J Commentarii mathematici Helvetici %D 1966 %P 18-29 %V 41 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1966__41_139310/ %F CMH_1966__41_139310