Danciu, Ioan. “ Polynomial Spline Collocation Methods for Volterra Integro-Differential Equations”. Rev. Anal. Numér. Théor. Approx. 25, no. 1 (August 1, 1996): 77-91. Accessed November 29, 2021. https://ictp.acad.ro/jnaat/journal/article/view/1996-vol25-nos1-2-art8.