TY - JOUR AU - E. E. Marenich TI - The action of the automorphism group of a finite graded partially ordered set on levels JO - Diskretnaya Matematika PY - 1997 SP - 63 EP - 72 VL - 9 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_1997_9_4_a5/ LA - ru ID - DM_1997_9_4_a5 ER -