@article{10_4153_CJM_1979_096_x,
     author = {Cordes, Craig M. and Jr., John R. Ramsey},
     title = {Quadratic forms over {Quadratic} {Extensions} of {Fields} with {Two} {Quaternion} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {1047--1058},
     year = {1979},
     volume = {31},
     number = {5},
     doi = {10.4153/CJM-1979-096-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-096-x/}
}