@article{MAN_1976__219_182754,
     author = {Richard Elman and T.Y. Lam},
     title = {Quadratic {Forms} {Under} {Algebraic} {Extensions.}},
     journal = {Mathematische Annalen},
     pages = {21--42},
     year = {1976},
     volume = {219},
     zbl = {0302.10025},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__219_182754/}
}