CHAPWANYA, Natsai; GOREJENA, Karikoga Norman. Hybrid Unsupervised Machine Learning for Insurance Fraud Detection: PCA-XGBoost-LOF and Isolation Forest. Journal of Information Systems and Informatics, [S. l.], v. 7, n. 1, p. 941–959, 2025. DOI: 10.51519/journalisi.v7i1.958. Disponível em: https://www.journal-isi.org/index.php/isi/article/view/958. Acesso em: 7 mar. 2026.