Numerical Solution of Fourth Order Boundary Value Problems by Petrov-Galerkin Method with Quartic B-splines as basis functions and Sextic B-Splines as weight functions. International Journal of Engineering and Computer Science, india, v. 5, n. 9, 2016. Disponível em: https://ijecs.in/index.php/ijecs/article/view/2515. Acesso em: 5 dec. 2025.