Smart UPI Based Vendor Wallet System. International Research Journal on Advanced Engineering Hub (IRJAEH), [S. l.], v. 4, n. 06, p. 4115–4120, 2026. DOI: 10.47392/IRJAEH.2026.0531. Disponível em: https://irjaeh.com/index.php/journal/article/view/1834.. Acesso em: 20 jul. 2026.