Credit Card Fraud Detection Using Hidden Markov Model. International Journal of Engineering and Computer Science, india, v. 8, n. 11, p. 24878–24882, 2019. DOI: 10.18535/ijecs/v8i11.4386. Disponível em: http://ijecs.in/index.php/ijecs/article/view/4386. Acesso em: 11 apr. 2025.