BACHHAV , Monali; KALE, Ashutosh Sharad; DAULE , Siddhant Santosh; BIKKAD , Pradnya Dhanraj. Payoff: Secure Offline Payment System using Bluetooth and Block-Chain. International Journal of Recent Advances in Engineering and Technology, [S. l.], v. 14, n. 1s, p. 226–228, 2025. Disponível em: https://journals.mriindia.com/index.php/ijraet/article/view/280. Acesso em: 11 sep. 2025.