T. HENSON; G. ARUNAGIRI. Fundamental Operation of Differential Transformation Method. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 4 (Special Issue), p. 74–81, 2016. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1422. Acesso em: 20 may. 2024.