Hemalatha Ramasubramanian, Madhulika P. Sarkar, and Parul Bhatia. “Testing Market Efficiency of Oil, Steel & Power Stocks: Post 2000 Era”. Global Journal of Enterprise Information System, Vol. 7, no. 2, Mar. 2020, pp. 39-46, https://gjeis.com/index.php/GJEIS/article/view/389.