%0 Journal Article %A V. N. Sachkov %T Reduction operator and transforms with a hereditary property.~II %J Trudy po diskretnoj matematike %D 2007 %P 269-286 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/TDM_2007_10_a13/ %G ru %F TDM_2007_10_a13