TY - JOUR AU - V. A. Voblyi TI - Some necessary conditions for a polynomial to be chromatic JO - Diskretnaya Matematika PY - 2001 SP - 73 EP - 77 VL - 13 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_2001_13_1_a3/ LA - ru ID - DM_2001_13_1_a3 ER -