?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Pham%2C+Tuan+Anh&rft.aulast=Pham&rft.aufirst=Tuan+Anh&rft.volume=88&rft.date=December+2017&rft.issn=0305-0548&rft.atitle=Solving+the+multi-vehicle+multi-covering+tour+problem&rft.title=Computers+%26+Operations+Research&rft.pages=258-278&rft.genre=article