%0 Journal Article
%A Grätzer, G.
%T Congruences and Trajectories in Planar Semimodular Lattices
%J Discussiones Mathematicae. General Algebra and Applications
%D 2018
%P 131-142
%V 38
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DMGAA_2018_38_1_a9/
%G en
%F DMGAA_2018_38_1_a9