TY - JOUR AU - H. Render TI - Extreme positive operators on involution algebras JO - Colloquium Mathematicum PY - 1990 SP - 81 EP - 96 VL - 59 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-59-1-81-96/ DO - 10.4064/cm-59-1-81-96 LA - en ID - 10_4064_cm_59_1_81_96 ER -