TY - JOUR AU - Shing Tung Yau AU - H. Blaine jr. Lawson TI - Scalar Curvature, Non-Abelian Group Actions, and the Degree of Symmetry of Exotic Spheres JO - Commentarii mathematici Helvetici PY - 1974 SP - 232 EP - 244 VL - 49 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1974__49_139582/ ID - CMH_1974__49_139582 ER -