?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.egypro.2017.12.326&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=J.C.&rft.au=Kurnia%2C+J.C.&rft.aulast=Kurnia&rft.issn=18766102&rft.title=Heat+transfer+performance+and+entropy+generation+of+helical+square+tubes+with+various+curvature+radiuses&rft.date=2017&rft.genre=proceeding