%0 Journal Article %A Cordes, Craig M. %A Jr., John R. Ramsey %T Quadratic forms over Quadratic Extensions of Fields with Two Quaternion Algebras %J Canadian journal of mathematics %D 1979 %P 1047-1058 %V 31 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-096-x/ %R 10.4153/CJM-1979-096-x %F 10_4153_CJM_1979_096_x