Valen Tino Rosi, Ari Muzakir, A. Haidar Mirza, Fitri Purwaningtias. Comparing Latent Dirichlet Allocation and Non-Negative Matrix Factorization for Topic Modeling of User Complaints in the Access by KAI Application. IJEVSS [Internet]. 2026Aug.20 [cited 2026Oct.13];5(03):8123-38. Available from: https://e-journal.citakonsultindo.or.id/index.php/IJEVSS/article/view/5952