Zhao, Zhihong, Yingzhen Lin, and Jing Niu. “Convergence Order of the Reproducing Kernel Method for Solving Boundary Value Problems”. Mathematical Modelling and Analysis 21, no. 4 (June 23, 2016): 466-477. Accessed February 25, 2025. https://aviation.vgtu.lt/index.php/MMA/article/view/828.