TY  - JOUR
AU  - Halaš, Radomír
AU  - Hort, Daniel
TI  - A characterization of 1-, 2-, 3-, 4-homomorphisms of ordered sets
JO  - Czechoslovak Mathematical Journal
PY  - 2003
SP  - 213
EP  - 221
VL  - 53
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMJ_2003__53_1_a16/
LA  - en
ID  - CMJ_2003__53_1_a16
ER  -