%0 Journal Article %A Šmarda, Bohumil %T Ideal systems of intersection and product type %J Archivum mathematicum %D 1980 %P 59-65 %V 16 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1980__16_1_a6/ %G en %F ARM_1980__16_1_a6