Hassan helal abdolah R. Derivation of Composition Formula for Evaluating Triple Integrals Numerically BY Using Trapezoidal rule and Midpoint and when the Singularity at both of End Integrals. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2017 Aug. 7 [cited 2024 May 18];8(2):16-28. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/36