Scalar Curvature, Non-Abelian Group Actions, and the Degree of Symmetry of Exotic Spheres Shing Tung Yau; H. Blaine jr. Lawson — 1974 Commentarii mathematici Helvetici
An intrinsic characterization of Kähler manifolds. Reese Harvey; H. Jr. Blaine Lawson — 1983 Inventiones mathematicae