@inproceedings{pirkwieser-09b,
 author = {Sandro Pirkwieser and Günther R. Raidl},
 booktitle = {Hybrid Metaheuristics 2009},
 editor = {M. J. Blesa and others},
 keywords = {hybrid, mip, vns, vrp},
 pages = {175--189},
 publisher = {Springer},
 series = {LNCS},
 title = {Multiple Variable Neighborhood Search Enriched with {ILP} Techniques for the Periodic Vehicle Routing Problem with Time Windows},
 url = {https://www.ac.tuwien.ac.at/files/pub/pirkwieser-09b.pdf},
 volume = {5818},
 year = {2009}
}