?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.solener.2017.05.038&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S.E.&rft.au=Gilani%2C+S.E.&rft.aulast=Gilani&rft.volume=151&rft.date=2017&rft.pages=173-185&rft.title=Solar+Energy&rft.issn=0038092X&rft.atitle=Performance+enhancement+of+free+convective+solar+air+heater+by+pin+protrusions+on+the+absorber&rft.genre=article