Prajapati, Chetan, Bhavik Patel, and R Badmanaban. 2014. “Development and Validation of HPTLC Method for Simultaneous Estimation of Sildenafil Citrate and Dapoxetine Hydrochloride in Combined Dosage Form”. PharmaTutor 2 (10), 142-52. http://www.pharmatutorjournal.com/index.php/pt/article/view/205.