@inproceedings{michallet:hal-02552249, TITLE = {{A periodic vehicle routing problem with time windows and time spread constraints on services}}, AUTHOR = {Michallet, Julien and Prins, Christian and Amodeo, Lionel and Yalaoui, Farouk and Vitry, Gr{\'e}goire}, URL = {https://utt.hal.science/hal-02552249}, BOOKTITLE = {{MIC 2011: The IX Metaheuristics International Conference}}, ADDRESS = {Udine, Italy}, SERIES = {MIC 2011: The IX Metaheuristics International Conference, Udine, Italy, July 2011}, YEAR = {2011}, MONTH = Jul, HAL_ID = {hal-02552249}, HAL_VERSION = {v1}, }