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.