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@article{IM_1979__55_186138, author = {Henry B. Laufer}, title = {Ambient {Deformations} for {Exceptional} {Sets} in {Two-Manifolds.}}, journal = {Inventiones mathematicae}, pages = {1--36}, publisher = {mathdoc}, volume = {55}, year = {1979}, zbl = {0509.32010}, url = {http://geodesic.mathdoc.fr/item/IM_1979__55_186138/} }
Henry B. Laufer. Ambient Deformations for Exceptional Sets in Two-Manifolds.. Inventiones mathematicae, Tome 55 (1979), pp. 1-36. http://geodesic.mathdoc.fr/item/IM_1979__55_186138/