TY - JOUR AU - Dimiter Ivanchev TI - Finding the k Most Vital Elements of an s-t Planar Directed Network JO - Yugoslav journal of operations research PY - 2000 SP - 13 VL - 10 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/YJOR_2000_10_1_a1/ LA - en ID - YJOR_2000_10_1_a1 ER -