Yusfida A’la, F. ., N. . Firdaus, and A. . Supriyadi. “Optimizing Alternating Least Squares for Recommender Systems Using Particle Swarm Optimization”. Jurnal Teknik Informatika (Jutif), vol. 6, no. 4, Sept. 2025, pp. 2870-8, doi:10.52436/1.jutif.2025.6.4.5154.