@inproceedings{SagnolBlancoSauvage2018, author = {Guillaume Sagnol and Marco Blanco and Thibaut Sauvage}, title = {Approximation Hierarchies for the cone of flow matrices}, booktitle = {INOC 2017 - 8th International Network Optimization Conference}, volume = {64}, pages = {275 -- 284}, doi = {10.1016/j.endm.2018.02.002}, year = {2018}, }