Singh, S., M. Arif, S. Ranjan, and M. Nasim. “Comparative in Vitro Antioxidant Activity of Natural and Cultured Ophiocordyceps Sinensis”. International Journal of Advancement in Life Sciences Research, Vol. 1, no. 3, Jan. 2018, pp. 30-39, https://ijalsr.org/index.php/journal/article/view/26.