TY - JOUR AU - Heinz Hopf AU - Yoshie Katsurada TI - Some Congruence Theorems for Closed Hypersurfaces in Riemann Space. (Part II: Method based on a Maximum Principle). JO - Commentarii mathematici Helvetici PY - 1968 SP - 217 EP - 224 VL - 43 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1968__43_139364/ ID - CMH_1968__43_139364 ER -