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@article{MZ_1987__195_183699, author = {Y.Y. Baldin and Maria H. Noronha}, title = {Some {Complete} {Manifolds} with {Non-Negative} {Curvature} {Operator.}}, journal = {Mathematische Zeitschrift}, pages = {383--390}, publisher = {mathdoc}, volume = {195}, year = {1987}, zbl = {0602.53033}, url = {http://geodesic.mathdoc.fr/item/MZ_1987__195_183699/} }
Y.Y. Baldin; Maria H. Noronha. Some Complete Manifolds with Non-Negative Curvature Operator.. Mathematische Zeitschrift, Tome 195 (1987), pp. 383-390. http://geodesic.mathdoc.fr/item/MZ_1987__195_183699/