ANSARI, TARIQ MAHMOOD, RAZA, ASAD, NIAZI, SHAHIDA BAGUM, AND BUKHARI, SYED. "A Simple Spectrophotometric Determination of Diclofenac Sodium in Commercial Dosage Forms using 2,3-Dichloro-5, 6-Dicyano-1,4-Benzoquinone (DDQ)" Pakistan Journal of Analytical & Environmental Chemistry [Online], Volume 6 Number 1 (1 June 2005)