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@article{MM2_1989__63_3_155368, author = {Thomas Peternell}, title = {Singular sufaces and the rigidity of {IP3.}}, journal = {Manuscripta mathematica}, pages = {69--82}, publisher = {mathdoc}, volume = {63}, number = {3}, year = {1989}, zbl = {0679.32022}, url = {http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155368/} }
Thomas Peternell. Singular sufaces and the rigidity of IP3.. Manuscripta mathematica, Tome 63 (1989) no. 3, pp. 69-82. http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155368/