%0 Journal Article %A James OʼShea %T Sums of squares in certain quaternion and octonion algebras %J Comptes Rendus. Mathématique %D 2011 %P 239-242 %V 349 %N 5-6 %I Elsevier %R 10.1016/j.crma.2011.01.022 %G en %F CRMATH_2011__349_5-6_239_0