Rupa, Mahua Jahan, and Md Shafiqul Islam. “Numerical Solutions of System of Second Order Boundary Value Problems Using Galerkin Method”. GANIT: Journal of Bangladesh Mathematical Society 37 (February 20, 2018): 161–174. Accessed April 15, 2025. https://banglajol.info/index.php/GANIT/article/view/35734.