PROF. PRIYA PARATE 2, P. S. P. Private Data Sharing and File Authentication using Two-Level QR Code. International Journal of Engineering Technology and Computer Research, [S. l.], v. 5, n. 5, 2017. Disponível em: https://ijetcr.org/index.php/ijetcr/article/view/450. Acesso em: 26 aug. 2026.