Ravikiran A. Mundewadi, and Bhaskar A. Mundewadi. “Haar Wavelet Collocation Method for the Numerical Solution of Integral and Integro-Differential Equations”. International Journal of Mathematics And Its Applications, vol. 6, no. 1 - E, Mar. 2018, pp. 1133-49, https://ijmaa.in/index.php/ijmaa/article/view/1215.