Oja, P., and M. Tarang. “Stability of Piecewise Polynomial Collocation for Volterra integro‐differential Equations”. Mathematical Modelling and Analysis 6, no. 2 (December 15, 2001): 310-320. Accessed December 22, 2024. https://jeelm.vgtu.lt/index.php/MMA/article/view/9920.