Tsvetkova, Boyka, and Lily Peikova. “HPLC METHOD FOR SIMULTANEOUS DETERMINATION OF KETOPROFEN AND PRESERVATIVES IN GEL FORMULATION”. International Journal of Pharmacy and Pharmaceutical Sciences 6, no. 11 (November 1, 2014): 199–202. Accessed December 5, 2025. https://www.journals.innovareacademics.in/index.php/ijpps/article/view/2960.