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@article{MAN_1990__288_1_164725, author = {R. Sujatha}, title = {Witt groups of real projective surfaces.}, journal = {Mathematische Annalen}, pages = {89--102}, publisher = {mathdoc}, volume = {288}, number = {1}, year = {1990}, zbl = {0692.14012}, url = {http://geodesic.mathdoc.fr/item/MAN_1990__288_1_164725/} }
R. Sujatha. Witt groups of real projective surfaces.. Mathematische Annalen, Tome 288 (1990) no. 1, pp. 89-102. http://geodesic.mathdoc.fr/item/MAN_1990__288_1_164725/