%0 Journal Article %A Rmoutil, Martin %T Products of non-$\sigma $-lower porous sets %J Czechoslovak Mathematical Journal %D 2013 %P 205-217 %V 63 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0014-4/ %R 10.1007/s10587-013-0014-4 %G en %F 10_1007_s10587_013_0014_4