Tiwari, S. ., R. . Kishor Pandey, H. . Singh, and J. . Singh. “Embedded Pseudo-Runge-Kutta Methods for First and Second Order Initial Value Problems”. Science & Technology Asia, vol. 25, no. 1, Mar. 2020, pp. 128-41, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/240326.