I. F. Okoye, I. O. Alaekwe, and O. Abba, “UV-VIS SPECTROPHOTOMETER ANALYSIS OF FILM GROWN USING NATURAL DYE FROM LAWSONIA INERMIS (HENNA PLANT)”, NJP, vol. 30, no. 2, pp. 135–139, Nov. 2021, Accessed: Aug. 21, 2025. [Online]. Available: https://njp.nipngr.org/index.php/njp/article/view/104