Zuliuskandar, V. V., M. Yusa, and E. P. Purwandari. “HYBRID METHOD USING NON-NEGATIVE MATRIX FACTORIZATION AND KEYWORD-BASED FILTERING FOR RECOMMENDER SYSTEM IN MOOCS”. Jurnal Teknik Informatika (Jutif), Vol. 6, no. 1, Feb. 2025, pp. 345-58, doi:10.52436/1.jutif.2025.6.1.3605.