Sunitha, Ponnuveetil Gopi, and Kaliappan Ilango. “Validated RP-HPLC and HPTLC Methods for Simultaneous Estimation of Febuxostat and Diclofenac Sodium in Pharmaceutical Dosage Form”. European Journal of Chemistry, vol. 5, no. 3, Sept. 2014, pp. 545-9, doi:10.5155/eurjchem.5.3.545-549.1066.