%0 Journal Article %A R. Sikorski %T Independent fields and cartesian products %J Studia Mathematica %D 1950 %P 171-184 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-11-1-171-184/ %R 10.4064/sm-11-1-171-184 %G en %F 10_4064_sm_11_1_171_184