Sareen, Rashmi, et al. “TOPICAL GEL INCORPORATED WITH NON-IONIC SURFACTANT BASED SOLID LIPID MICROSPHERES OF KETOPROFEN: PHYSICOCHEMICAL ANALYSIS AND ANTI-INFLAMMATORY EVALUATION”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 7, no. 11, Oct. 2015, pp. 199-06, https://www.journals.innovareacademics.in/index.php/ijpps/article/view/7532.