Umeoguaju, F.U. et al. 2023. Macroporous Resin-assisted Enrichment of Total Flavonoids, Polyphenols and Antioxidants from Newbouldia laevis Leaf Extracts: http://www.doi.org/10.26538/tjnpr/v7i1.28. Tropical Journal of Natural Product Research (TJNPR). 7, 1 (Feb. 2023), 2270–2278.