Time dependent vehicle routing problem with a multi ant colony system

@article{Donati2008TimeDV,
  title={Time dependent vehicle routing problem with a multi ant colony system},
  author={Alberto V. Donati and Roberto Montemanni and Norman Casagrande and Andrea Emilio Rizzoli and Luca Maria Gambardella},
  journal={Eur. J. Oper. Res.},
  year={2008},
  volume={185},
  pages={1174-1191}
}
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