@article {5520,
	title = {A column generation approach for the strong network orientation problem},
	journal = {Electronic Notes in Discrete Mathematics},
	volume = {62},
	year = {2017},
	pages = {75-80},
	abstract = {In this study, an aggregated flow formulation and a column generation strategy are proposed for the Strong Network Orientation Problem (SNOP) that consists in setting an orientation for each edge in a given graph, such that the resulting digraph is strongly connected and the total travel distance between all pairs of vertices is minimized. SNOP is NP-hard and finds application in urban networks.},
	url = {https://www.sciencedirect.com/science/article/abs/pii/S1571065317302524},
	author = {Alexandre Xavier Martins and Christophe Duhamel and Andr{\'e}a Cynthia Santos}
}
