et. al., Dr. Jyoti Prasad Kalita,. “A Study of Trend of Price Net Operating Revenue and Earnings Yield of Selected Public Sector Companies in India ”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 12, no. 10, Apr. 2021, pp. 5141-7, doi:10.17762/turcomat.v12i10.5296.