%0 Journal Article %A McDonald, John N. %T Extreme operators on H∞ %J Glasgow mathematical journal %D 1976 %P 155-157 %V 17 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002901/ %R 10.1017/S0017089500002901 %F 10_1017_S0017089500002901