Saksomboon, S., and P. Intraprom. “Comparing Return, Risk, and Efficiency Between Portfolios Using the Value Investing Approach and Equity Mutual Funds”. Rajapark Journal, vol. 13, no. 29, June 2019, pp. 76-89, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/131331.