Dr. Anusiuba Overcomer Ifeanyi Alex, Okechukwu Ogochukwu Patience, Ekwealor Oluchukwu Uzoamaka, and Anusiuba Amarachukwu Angela. “The Application of Hidden Markov Model in Credit Card Fraud Detection System”. iJournals:International Journal of Software & Hardware Research in Engineering ISSN:2347-4890 10, no. 2 (February 25, 2022). Accessed June 18, 2026. https://ijournals.in/journal/index.php/ijshre/article/view/85.