?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Bulh%C3%B5es%2C+Teobaldo&rft.aulast=Bulh%C3%B5es&rft.aufirst=Teobaldo&rft.date=2017&rft.issn=0377-2217&rft.atitle=The+vehicle+routing+problem+with+service+level+constraints&rft.title=European+Journal+of+Operational+Research&rft.genre=article