@article{CMH_1976__51_139661,
     author = {Shing Tung Yau and Richard Schoen},
     title = {Harmonic {Maps} and the {Topology} of {Stable} {Hypersurfaces} and {Manifolds} with {Non-negative} {Ricci} {Curvature}},
     journal = {Commentarii mathematici Helvetici},
     pages = {333--342},
     publisher = {mathdoc},
     volume = {51},
     year = {1976},
     zbl = {0361.53040},
     url = {http://geodesic.mathdoc.fr/item/CMH_1976__51_139661/}
}