%0 Journal Article %A W. Mlak %T A note on a Szegö type properties of semi-spectral measures %J Studia Mathematica %D 1968 %P 241-251 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-31-3-241-251/ %R 10.4064/sm-31-3-241-251 %G en %F 10_4064_sm_31_3_241_251