%0 Journal Article %A Artur Siemaszko %T On group extensions of 2-fold simple ergodic actions %J Studia Mathematica %D 1994 %P 53-64 %V 110 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-110-1-53-64/ %R 10.4064/sm-110-1-53-64 %G en %F 10_4064_sm_110_1_53_64