$\mathcal{H}$-Stability of Runge-Kutta Methods with Variable Stepsize for System of Pantograph Equations. Journal of Computational Mathematics, [S. l.], v. 22, n. 5, p. 727–734, 2004. Disponível em: https://global-sci.com/JCM/article/view/11668. Acesso em: 4 mar. 2026.