Revisiting the Hamiltonian p-median problem: A new formulation on directed graphs and a branch-and-cut algorithm European Journal of Operational Research Journal Article Tolga Bektas Luis Gouveia Daniel Santos Publication Year of Publication: 2019 Identifiers ISSN: 0377-2217 Locators URL https://doi.org/10.1016/j.ejor.2018.12.041 DOI: 10.1016/j.ejor.2018.12.041 Sustainable Development Goals