Hani Nurrahmi, A. T. Wibowo, and S. Meliana. “Non-Negative Matrix Factorization Based Recommender System Using Female Daily Implicit Feedback”. Indonesia Journal on Computing (Indo-JC), Vol. 7, no. 1, Apr. 2022, pp. 1-14, doi:10.34818/INDOJC.2022.7.1.599.