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@article{IM_1994__117_1_144217, author = {J.M. Landsberg}, title = {On second fundamental forms of projective varieties.}, journal = {Inventiones mathematicae}, pages = {303--316}, publisher = {mathdoc}, volume = {117}, number = {1}, year = {1994}, zbl = {0840.14025}, url = {http://geodesic.mathdoc.fr/item/IM_1994__117_1_144217/} }
J.M. Landsberg. On second fundamental forms of projective varieties.. Inventiones mathematicae, Tome 117 (1994) no. 1, pp. 303-316. http://geodesic.mathdoc.fr/item/IM_1994__117_1_144217/