Usifoh, C. O., S. A. Adelusi, and R. F. Adebambo. “COLORIMETRIC DETERMINATION OF PARACETAMOL IN RAW MATERIAL AND IN PHARMACEUTICAL DOSAGE FORMS”. Biological Sciences - PJSIR, vol. 45, no. 1, Feb. 2002, pp. 7-9, https://v2.pjsir.org/index.php/biological-sciences/article/view/1729.