Archana Bisen, Mahendra Sahare, and Sini Shibu. “Enhancing Strength Of Graphical Password Using Image Based Textual Password”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 2, no. 7, July 2015, pp. 165-71, https://ijaerd.com/index.php/IJAERD/article/view/981.