@article{DBLP:journals/orl/HougardyZZ20,
  title = "The approximation ratio of the 2-Opt Heuristic for the metric Traveling Salesman Problem",
  author = "Stefan Hougardy and Fabian Zaiser and Xianghui Zhong",
  year = "2020",
  journal = "Oper. Res. Lett.",
  number = "4",
  pages = "401--404",
  url = "https://doi.org/10.1016/j.orl.2020.05.007",
  volume = "48",
  doi = "10.1016/j.orl.2020.05.007",
}