IDOWU, S., O. ADEGOKE, A. ADENIJI, and A. OLANIYI. “Colorimetric Assay Of Naproxen Tablets by Derivatization Using 4-Carboxyl-2,6-Dinitrobenzene Diazonium Ion”. The East and Central African Journal of Pharmaceutical Sciences, Vol. 12, no. 1, Nov. 2018, pp. 8-14, https://uonjournals.uonbi.ac.ke/ojs/index.php/ecajps/article/view/85.