TY - JOUR AU - OʼShea, James TI - Sums of squares in certain quaternion and octonion algebras JO - Comptes Rendus. Mathématique PY - 2011 SP - 239 EP - 242 VL - 349 IS - 5-6 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2011.01.022/ DO - 10.1016/j.crma.2011.01.022 LA - en ID - CRMATH_2011__349_5-6_239_0 ER -