S. IDOWU, O. ADEGOKE, A. ADENIJI, and A. OLANIYI, “Colorimetric Assay Of Naproxen Tablets by Derivatization Using 4-Carboxyl-2,6-Dinitrobenzene Diazonium Ion”, ECAJPS, vol. 12, no. 1, pp. 8-14, Nov. 2018.