TY  - JOUR
AU  - Skowronek-Kaziów, J.
TI  - Properties of digraphs connected with some congruence relations
JO  - Czechoslovak Mathematical Journal
PY  - 2009
SP  - 39
EP  - 49
VL  - 59
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMJ_2009__59_1_a2/
LA  - en
ID  - CMJ_2009__59_1_a2
ER  -