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@article{MAN_1986__276_164226, author = {M. Strake}, title = {Curvature {Increasing} {Metric} {Variations.}}, journal = {Mathematische Annalen}, pages = {633--642}, publisher = {mathdoc}, volume = {276}, year = {1986}, zbl = {0616.53036}, url = {http://geodesic.mathdoc.fr/item/MAN_1986__276_164226/} }
M. Strake. Curvature Increasing Metric Variations.. Mathematische Annalen, Tome 276 (1986), pp. 633-642. http://geodesic.mathdoc.fr/item/MAN_1986__276_164226/