Boonvorachote, T., and S. Panyawattananon. “Returns, Investor Trading Volumes and Price Volatility Relationships on the Stock Exchange of Thailand”. Kasetsart Journal of Social Sciences, vol. 33, no. 2, Aug. 2012, pp. 264-77, https://so04.tci-thaijo.org/index.php/kjss/article/view/246816.