?url_ver=Z39.88-2004&rft_id=10.1109%2FTSE.2021.3113859&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nguyen%2C+Thu+Trang&rft.aulast=Nguyen&rft.aufirst=Thu+Trang&rft.atitle=A+Variability+Fault+Localization+Approach+for+Software+Product+Lines&rft.title=IEEE+Transactions+on+Software+Engineering&rft.genre=article