%0 Journal Article %A Barnett, Christopher %T Averaging operators in non commutative Lp spaces I %J Glasgow mathematical journal %D 1983 %P 71-74 %V 24 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005073/ %R 10.1017/S0017089500005073 %F 10_1017_S0017089500005073