TY  - JOUR
AU  - Grätzer, G.
TI  - Congruences and Trajectories in Planar Semimodular Lattices
JO  - Discussiones Mathematicae. General Algebra and Applications
PY  - 2018
SP  - 131
EP  - 142
VL  - 38
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DMGAA_2018_38_1_a9/
LA  - en
ID  - DMGAA_2018_38_1_a9
ER  -