%0 Journal Article %A Łazarz, Marcin %T Characterization of Birkhoff’s Conditions by Means of Cover-Preserving and Partially Cover-Preserving Sublattices %J Bulletin of the Section of Logic %D 2016 %V 45 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/BSL_2016_45_3-4_a0/ %G en %F BSL_2016_45_3-4_a0