@article{cattaruzza2016multi,
title={The multi-trip vehicle routing problem with time windows and release dates},
author={Cattaruzza, Diego and Absi, Nabil and Feillet, Dominique},
journal={Transportation Science},
volume={50},
number={2},
pages={676--693},
year={2016},
publisher={INFORMS},
doi = {http://dx.doi.org/10.1287/trsc.2015.0608}
}