Rahul S Badhekar, Devika K Shete, Reshma K Shinde, and Prof.Shrikant N Dhage. “Secure Ranked Multi-Keyword Search for Multiple Data Owners in Cloud Computing”. International Journal of Advance Research in Engineering, Science & Technology, vol. 4, no. 5, May 2017, pp. 567-74, https://ijarest.org/index.php/ijarest/article/view/1571.