Hakam, Amirul, Chairul Imron, Basuki Widodo, and Tri Yogi Yuwono. 2018. “REDUCING THE DRAG ON A CIRCULAR CYLINDER BY UPSTREAM INSTALLATION OF CYLINDER TYPE-I AND DOWNSTREAM INSTALLATION OF ELLIPSE CYLINDER”. MATTER: International Journal of Science and Technology 4 (1):26-39. https://doi.org/10.20319/mijst.2018.41.2639.