Fuziyah Ishak and  Siti Norazura Ahmad,  Development of Extended Trapezoidal Method for Numerical Solution of Volterra Integro-Differential Equations.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 119(11). 579 - 582
    [viewed 23 May 2022]. Available from: https://publications.waset.org/pdf/10005777.