U. Satyanarayana, P. Rakesh Reddy, K. Kanthi Reddy, and K. Rama Krishna. 2014. “A Simple, Sensitive, Specific Reversed-Phase Ultra Performance Liquid Chromatographic UV Method For Estimation Of Paratoluenesulfonic Acid In Valacyclovir Hydrochloride Sample”. Caribbean Journal of Sciences and Technology 2 (01):642-48. https://caribjscitech.com/index.php/cjst/article/view/133.