Sahiti, M., and B. M. Gurupadayya. “Method Development and Validation for the Estimation of Valerenic Acid Content in Valerian Tablets Using RP-HPLC Method”. South Asian Research Journal of Natural Products, Vol. 2, no. 3, Oct. 2019, pp. 1-9, https://journalsarjnp.com/index.php/SARJNP/article/view/30087.