Suhaimi, Muhammad Syakir, and Ahmad Fu'ad Idris. “The Effect of Reynolds Number on 90° PVC Elbow Minor Loss Coefficient”. Research Progress in Mechanical and Manufacturing Engineering, vol. 4, no. 2, Dec. 2023, pp. 204-10, https://penerbit.uthm.edu.my/periodicals/index.php/rpmme/article/view/13545.