S. M. Aljassas, F. H.A. Alsharify, and N. A.M. Al–Karamy, “Driving Two Numerical Methods to Evaluate the Triple Integrals R(MSM),R(SMM) and Compare Between Them”, IJET, vol. 7, no. 3.27, pp. 303–309, Aug. 2018, doi: 10.14419/ijet.v7i3.27.17895.