AL-Bugami, A., and S. S. Al-Juaid. “Runge-Kutta and Block by Block Methods to Solve Non- Linear Volterra Integral Equation Of The Second Kind”. Journal of Progressive Research in Mathematics, Vol. 11, no. 3, Mar. 2017, pp. 1627-3, http://scitecresearch.com/journals/index.php/jprm/article/view/1020.