TY - JOUR AU - K. Urbanik TI - Reversibility in absolute-valued algebras JO - Fundamenta Mathematicae PY - 1962 SP - 131 EP - 140 VL - 51 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-51-2-131-140/ DO - 10.4064/fm-51-2-131-140 LA - en ID - 10_4064_fm_51_2_131_140 ER -