@article{OJMO_2021__2__A9_0,
     author = {Righini, Giovanni},
     title = {Efficient optimization of the {Held{\textendash}Karp} lower bound},
     journal = {Open Journal of Mathematical Optimization},
     eid = {9},
     pages = {1--17},
     publisher = {Universit\'e de Montpellier},
     volume = {2},
     year = {2021},
     doi = {10.5802/ojmo.11},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/ojmo.11/}
}