Phung, Viet, Nha Nguyen, and Thien Truong. “An Improved Radial Point Interpolation Method Applied for Elastic Problem With Functionally Graded Material”. Science and Technology Development Journal 18, no. 2 (June 30, 2015): 131-138. Accessed May 3, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1084.