?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.heliyon.2021.e06277&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Jeffri&rft.au=Jeffri%2C+N.F.S.&rft.aufirst=N.F.S.&rft.title=Heliyon&rft.date=2021&rft.issue=3&rft.volume=7&rft.issn=24058440&rft.atitle=A+review+of+augmented+reality+systems+and+their+effects+on+mental+workload+and+task+performance&rft.genre=article