@article{GDZPPN00233447X,
title = {Witt groups of real projective surfaces.},
journal = {Mathematische Annalen},
volume = {287},
year = {1990},
pages = {89-102},
zbl = {0692.14012},
url = {http://dml.mathdoc.fr/item/GDZPPN00233447X}
}
Sujatha, R. Witt groups of real projective surfaces.. Mathematische Annalen, Tome 287 (1990) pp. 89-102. http://gdmltest.u-ga.fr/item/GDZPPN00233447X/