W. C. K. Soon, C. P. Yee, D. K. S. Rajan, and Muhammad Ashraf Anuar, “The Effect of Global Pandemic COVID-19 and Economic Indicators on FTSE Bursa Malaysia KLCI Stock Returns Volatility: An Exploratory Sequential Mixed Methods Approach”, JIS, vol. 21, no. 2, pp. 134–147, Aug. 2025, doi: 10.32890/jis2025.21.2.7.