Lupaş, Alexandru. “Numerical Integration by Means of Gauss-Legendre Formula”. Anal. Numér. Théor. Approx. 9, no. 1 (February 1, 1980): 81–92. Accessed April 14, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1980-vol9-no1-art11.