U., J., T. Thayumanavan, T. B. Singh, and J. M. Sasikumar. “IN VITRO ANTIOXIDANT CAPACITY OF THE FERN, DRYNARIA QUERCIFOLIA (L) SM., RHIZOME EXTRACT”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 6, no. 7, July 2014, pp. 413-6, https://journals.innovareacademics.in/index.php/ijpps/article/view/2019.