ADEYEFA, E.O. ORTHOGONAL-BASED HYBRID BLOCK METHOD FOR SOLVING GENERAL SECOND ORDER INITIAL VALUE PROBLEMS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 37, p. 659–672, 2017. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6668. Acesso em: 5 sep. 2026.