N. Chinedu, S.; A.Imolorhe, Blessing; N. Iheagwam, F. Partial Purification and Kinetic Properties of Polygalacturonase from Chrysophyllum Albidum G. Don Fruit: doi.org 10.26538 Tjnpr V5i11.18. TJNPR 2021, 5 (11), 2000-2004.