M.Pallavi, Gowda.Shankar, and Doddamani. M.S. “PHARMACEUTICO –ANALYTICAL STUDY ON ASHUDHA AND SHUDHA SHILAJATU”. International Journal of Applied Ayurved Research, vol. 3, no. 4, Nov. 2017, pp. 746-55, https://ijaar.in/index.php/journal/article/view/490.