%0 Journal Article %A Putnam, R. %T Hilbert transforms and unitary equivalence %J Glasgow mathematical journal %D 1967 %P 113-117 %V 8 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000161/ %R 10.1017/S0017089500000161 %F 10_1017_S0017089500000161