Viswanathan, Balasubramanian (September 7, 2016). "2". Energy Sources: Fundamentals of Chemical Conversion Processes and Applications. Elsevier. doi:10.1016/C2011-0-05048-2. ISBN978-0-444-56353-8. Retrieved October 17, 2019.
Viswanathan, Balasubramanian (September 7, 2016). "2". Energy Sources: Fundamentals of Chemical Conversion Processes and Applications. Elsevier. doi:10.1016/C2011-0-05048-2. ISBN978-0-444-56353-8. Retrieved October 17, 2019.