%0 Journal Article %A Isaac Kornfeld %A %T Weak almost periodicity of $L_1$ contractions and coboundaries of non-singular transformations %J Studia Mathematica %D 2000 %P 225-240 %V 138 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-138-3-225-240/ %R 10.4064/sm-138-3-225-240 %G en %F 10_4064_sm_138_3_225_240