Adetuyi, A. O., L. Lajide, and A. V. Popoola. “Spectroscopic and Dyeing Characteristics of the Yellow Dye from Morinda Lucida (Brimstone Tree): Short Communication”. Biological Sciences - PJSIR, vol. 48, no. 6, Dec. 2005, pp. 430-2, https://v2.pjsir.org/index.php/biological-sciences/article/view/1439.