Ding, Honglin; Li, Jianping; Lih, Ko-Wei - In: European Journal of Operational Research 239 (2014) 1, pp. 80-88
Given a mixed graph G with vertex set V, let E and A denote the sets of edges and arcs, respectively. We use Q+ and Z+ to denote the sets of positive rational numbers and positive integers, respectively. For any connected mixed graph G=(V,E∪A;w;l,u) with a length function w:E∪A→Q+ and two...
