Kumar, Alok. “Tertiary Coal and Lignite Deposits of India and Their Source Rock Potential: A Review on the Contribution of the Indian Coal Petrologists”. Journal of Geological Society of India 98, no. 12 (December 31, 2022): 1745–1753. Accessed May 21, 2024. http://www.geosocindia.com/index.php/jgsi/article/view/173776.