Hanoon, Wafaa Hadi, and Rusul Hassan Naser. “Numerical Solution of Double Integral of Singular Derivatives Using Trapezoidal Method With Romberg Acceleration”. JOURNAL OF ADVANCES IN MATHEMATICS 9, no. 9 (January 28, 2015): 3048–3054. Accessed November 21, 2024. https://rajpub.com/index.php/jam/article/view/9-9-2235.