N. Ebrahimi and  J. Rashidinia,  Spline Collocation for Solving System of Fredholm and Volterra Integral Equations.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2014, vol. 90(6). 1008 - 1012
    [viewed 27 February 2020]. Available from: https://publications.waset.org/pdf/9999855.