TY - JOUR AU - Ivailo Shishkov TI - On a Conjecture of Choban, Gutev and Nedev JO - Mathematica balkanica PY - 2004 SP - 193 VL - 18 IS - 1-2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_2004_18_1-2_a20/ ID - MABA_2004_18_1-2_a20 ER -