S. Nemati and Y. Ordokhani, “SOLVING NONLINEAR TWO-DIMENSIONAL VOLTERRA INTEGRAL EQUATIONS OF THE FIRST-KIND USING BIVARIATE SHIFTED LEGENDRE FUNCTIONS”, Int. J. Math. Model. Comput., vol. 5, no. 3, pp. 219–230, Mar. 2015, Accessed: Jun. 06, 2026. [Online]. Available: https://oiccpress.com/ijm2c/article/view/11252