TY - JOUR AU - McDonald, John N. TI - Extreme operators on H∞ JO - Glasgow mathematical journal PY - 1976 SP - 155 EP - 157 VL - 17 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002901/ DO - 10.1017/S0017089500002901 ID - 10_1017_S0017089500002901 ER -