@article{MAN_1979__244_163296, author = {J.-L. Colliot-Th\'el\`ene and J.-J. Sansuc}, title = {Fibr\'es quadratiques et composantes connexes r\'eelles.}, journal = {Mathematische Annalen}, pages = {105--134}, publisher = {mathdoc}, volume = {244}, year = {1979}, zbl = {0418.14016}, url = {http://geodesic.mathdoc.fr/item/MAN_1979__244_163296/} }