Sumiyana, S. (2007) “Behavior of Stock Price Variability over Trading and Nontrading Periods, and Daily Return Volatility”, Gadjah Mada International Journal of Business, 9(3), pp. 409-453. Available at: https://journal.ugm.ac.id/v3/gamaijb/article/view/14937 (Accessed: 17August2024).