TY  - JOUR
AU  - A. A. Sapozhenko
TI  - The number of antichains in ranked partially ordered sets
JO  - Diskretnaya Matematika
PY  - 1989
SP  - 35
EP  - 58
VL  - 1
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DM_1989_1_1_a7/
LA  - ru
ID  - DM_1989_1_1_a7
ER  -