Kareem, S. O., et al. “Partial Purification of Pectinases from Mutants of Aspergillus Niger Using Moringa Oleifera”. Al-Hikmah Journal of Pure and Applied Sciences (AJPAS) , vol. 8, no. 1, June 2019, pp. 1-15, https://alhikmahuniversity.edu.ng/AJPAS/index.php/journal/article/view/180.