1. Kasumo, C.: On the approximate solutions of linear Volterra integral equations of the first kind. Appl. Math. Sci. 14(3), 141–153 (2020)
2. Shoukralla, E.S., Ahmed, B.M.: Numerical solutions of volterra integral equations of the second kind using lagrange interpolation via the vandermonde matrix. J. Phys: Conf. Ser. 1447(1), 012003 (2020)
3. Zheng, W., Chen, Y.: Numerical analysis for Volterra integral equation with two kinds of delay. Acta Math. Sci. 9(2), 607–617 (2019)
4. Dawood, H.K.: Computational block-pulse functions method for solving Volterra integral equations with delay. J. Univ. Babylon 27, 32–43 (2019)
5. Keshavarz, E., Ordokhani, Y., Razzaghi, M.: The Bernoulli wavelets operational matrix of integration and its applications for the solution of linear and nonlinear problems in calculus of variations. Appl. Math. Comput. 351, 83–98 (2019)