Nasution AB, Hrp AYN, Yudi Y, Fauzi M. Implementation of OTP Code as Application Login Verification Via Whatsapp. ESA [Internet]. 2024 Jul. 30 [cited 2026 Apr. 18];3(4):395-402. Available from: https://journal.formosapublisher.org/index.php/esa/article/view/10225