RENCY ELIZABETH THOMAS, et al. “MICROWAVE AND ULTRASONICATION ASSISTED EXTRACTION OF PHYTOCHEMICALS FROM B. Monnieri AND STUDY OF ITS ANTIOXIDANT ACTIVITY”. International Journal of Pharma and Bio Sciences, vol. 5, no. 1, Mar. 2014, pp. 66-69, https://ijpbs.net/index.php/journal/article/view/3015.