Kadam Rupa S, and Koul Anu. “MEDHYA (COGNITIVE ENHANCERS) HERBAL DRUGS OF BHAVPRAKASH NIGHANTU: A LITERARY REVIEW”. International Journal of Applied Ayurved Research, vol. 3, no. 2, July 2017, pp. 241-9, https://www.ijaar.in/index.php/journal/article/view/412.