TY - JOUR AU - Borodin, Oleg V. TI - Precise lower bound for the number of edges of minor weight in planar maps JO - Mathematica slovaca PY - 1992 SP - 129 EP - 142 VL - 42 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1992__42_2_a0/ LA - en ID - MASLO_1992__42_2_a0 ER -