@article{themultivehiclecoveringtourproblem,
  title = {The multi-vehicle covering tour problem: building routes for urban patrolling},
  author = {Washington Alves de Oliveira and Antonio Carlos Moretti and Ednei Felix Reis},
  year = {2013},
  eprint = {1309.5502},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1309.5502v2},
}