NISHESH SHARMA, et al. “INDIRECT REGENERATION FROM LEAF SEGMENTS FOR MASS PROPAGATION OF WITHANIA SOMNIFERA : AN ENDANGERED MEDICINAL PLANT”. International Journal of Pharma and Bio Sciences, vol. 5, no. 4, Sept. 2014, pp. 773-8, https://ijpbs.net/index.php/journal/article/view/3408.