A. Agung, A. Zaqiyah, M. Rozikin, M. S. Wafa, A. R. Nuha, and E. Sulistyono, “Causality Model of Trading Variables Between Trading Volume, Bid-Ask Spreads, and Stock Return Volatility (Case Study: Bisnis-27 Index)”, JSINTAK, vol. 3, no. 1, pp. 20–26, Sep. 2024.