Williyanto, D. ., S. . Nurwati, and R. Sarlawa. “Trading Frequency Affects Coal Mining Share Returns Trading Volume and Market Capitalization”. JSM: Journal Sains Manajemen, vol. 12, no. 1, May 2024, pp. 25-30, https://e-journal.upr.ac.id/index.php/JSM/article/view/13263.