Yeng, M. S. Mat, S. K. Ayop, and I. R. Mustapa. “Depth-Dependent Optical Stiffness Toward Water-Air Interface”. International Journal of Engineering & Technology 7, no. 4.30 (November 30, 2018): 80–84. Accessed April 30, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/22019.