1. I.C.o. Commerce, The Indian coal sector: challenges and future outlook, (2012).
2. BP, BP Statistical Review of World Energy, 67th edition (2018) 36–40.
3. BP, BP Statistical Review of World Energy, 67th edition (2018).
4. M.o.C. COAL CONTROLLER'S ORGANIZATION, Govt. of India, Provisional coal of statistics (2016-17) 2022.
5. Kinetics of Gasification and Co-gasification of Petcoke and Coal;Verma;J. Institut. Eng.,2020