Adetuyi, A. O., L. Lajide, and A. V. Popoola. 2005. “Spectroscopic and Dyeing Characteristics of the Yellow Dye from Morinda Lucida (Brimstone Tree): Short Communication”. Biological Sciences - PJSIR 48 (6):430-32. https://v2.pjsir.org/index.php/biological-sciences/article/view/1439.