?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.ejor.2021.07.008&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nguyen%2C+Minh+Anh&rft.aulast=Nguyen&rft.aufirst=Minh+Anh&rft.date=2021&rft.issn=03772217&rft.atitle=The+min-cost+parallel+drone+scheduling+vehicle+routing+problem&rft.title=European+Journal+of+Operational+Research&rft.genre=article