@article{JTNB_1990__2_1_155_0, author = {B. Kahn}, title = {Quelques remarques sur le $u$-invariant}, journal = {Journal de Th\'eorie des Nombres de Bordeaux}, pages = {155--161}, publisher = {Universit\'e Bordeaux I}, volume = {2}, number = {1}, year = {1990}, doi = {10.5802/jtnb.24}, zbl = {0712.12002}, mrnumber = {1061764}, language = {fr}, url = {https://jtnb.centre-mersenne.org/articles/10.5802/jtnb.24/} }