Mahdi Muosa, Safaa, et al. “FindingCorrection Terms Accompaniment of Rule MMS of Triple Integrals Partial Derivative Singular or Singular Numerically”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 8, no. 2, Aug. 2017, pp. 1-15, https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/35.