OGUNNIRAN, M. O.; TIJANI, N. A.; ADEDOKUN, K. A.; O.KAREEM, K. O. An accurate hybrid block technique for second order singular problems in ordinary differential equations. African Journal of Pure and Applied Sciences, Nairobi, Kenya, v. 3, n. 1, p. 144–154, 2022. Disponível em: https://journal.ku.ac.ke/index.php/AJPAS/article/view/257. Acesso em: 12 feb. 2025.