Krishna, U., R. P. Nayak, and C. S. R. “Preclinical Evaluation of Antidepressant Activity of Aqueous Extract of Piper Betle Leaves in Swiss Albino Mice”. International Journal of Basic & Clinical Pharmacology, vol. 8, no. 1, Dec. 2018, pp. 143-6, doi:10.18203/2319-2003.ijbcp20185173.