%0 Journal Article %A P. G. Walczak %T On balls and totally geodesic submanifolds %J Annales Polonici Mathematici %D 1984 %P 317-324 %V 44 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-44-3-317-324/ %R 10.4064/ap-44-3-317-324 %G en %F 10_4064_ap_44_3_317_324