NADAKUDITI MALLIKHARJUNA SWAMY, and K.KIRAN KUMAR. “Augmenting Privacy for Cloud Users through Advanced Access Control Scheme for MultiAuthority Cloud Storage”. International Journal of Computer Engineering in Research Trends, vol. 2, no. 11, Nov. 2015, pp. 862-6, https://www.ijcert.org/index.php/ijcert/article/view/300.