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@article{MAN_1980__251_163438, author = {M. Kalka}, title = {Deformation of {Submanifolds} of {Strongly} {Negatively} {Curved} {Manifolds.}}, journal = {Mathematische Annalen}, pages = {243--248}, publisher = {mathdoc}, volume = {251}, year = {1980}, zbl = {0424.58011}, url = {http://geodesic.mathdoc.fr/item/MAN_1980__251_163438/} }
M. Kalka. Deformation of Submanifolds of Strongly Negatively Curved Manifolds.. Mathematische Annalen, Tome 251 (1980), pp. 243-248. http://geodesic.mathdoc.fr/item/MAN_1980__251_163438/