?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ha%2C+Quang+Minh&rft.aulast=Ha&rft.aufirst=Quang+Minh&rft.volume=86&rft.date=2018&rft.issn=0968-090X&rft.atitle=On+the+min-cost+traveling+salesman+problem+with+drone&rft.title=Transportation+Research+Part+C&rft.pages=597-621&rft.genre=article