1. https://en.wikipedia.org/wiki/Energy_policy_of_India.
2. https://en.wikipedia.org/wiki/Chasnala_mining_disaste.
3. Modernization of Indian coal mining industry:Vision 2025;Chaulya;J. Sci. Ind. Res.,2008
4. Wireless sensor networks for industrial process monitoring and control: a survey;Zhao;Netw. Protoc. Alg.,2011
5. An application of wireless sensor networks in underground coal mine;Zhao;Int. J. Future Gen. Commun. Netw.,2013