Lumbantoruan, Sari, et al. “Prediksi Harga Saham PT Telkom Indonesia Tbk (TLKM) Menggunakan Linear Regression, Random Forest, Dan XGBoost”. RIGGS: Journal of Artificial Intelligence and Digital Business, vol. 4, no. 4, Dec. 2025, pp. 3429-38, doi:10.31004/riggs.v4i4.4158.