%0 Journal Article %A Berkson, Earl %A Porta, Horacio %T The group of isometries on Hardy spaces of the n-ball and the polydisc %J Glasgow mathematical journal %D 1980 %P 199-204 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004183/ %R 10.1017/S0017089500004183 %F 10_1017_S0017089500004183