Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AA_1990_2_1_a7, author = {M. Szyjewski}, title = {The fifth invariant of quadratic forms}, journal = {Algebra i analiz}, pages = {213--234}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1990_2_1_a7/} }
M. Szyjewski. The fifth invariant of quadratic forms. Algebra i analiz, Tome 2 (1990) no. 1, pp. 213-234. http://geodesic.mathdoc.fr/item/AA_1990_2_1_a7/