NON-POLYNOMIAL CUBIC SPLINE APPROACH FOR NUMERICAL APPROXIMATION OF SECOND ORDER LINEAR KLEIN-GORDON EQUATION. Pakistan Journal of Science, [S. l.], v. 67, n. 4, 2015. DOI: 10.57041/vol67iss4pp%p. Disponível em: https://paas-pk.org/index.php/pjs/article/view/603. Acesso em: 29 oct. 2025.