Jadhao, P.,& Dole,L. (2013). Survey on Authentication Password Techniques. International Journal of Soft Computing and Engineering (IJSCE), 67-68
Jansen,W.(2015).Authenticating Users on Handheld Devices. Canadian Information Technology Security Symposium, (pp.1-12).
Grawemeyer, B., & Johnson, H. (2011). Using and managing multiple passwords: A week to a view. Interacting  with Computers,23(3), 256–267. Retrieved from https://doi.org/10.1016/j.intcom.2011.03.007
Choong,  Y., & Greene, K. (2016). What’s a special character anyway? Effects of ambiguous. Proceedings of the Human Factors and Ergonomics, (pp.760-764).
Kaye, J. (2011). Self-reported password sharing strategies. Proceedings  of the SIGCHI Conferenceon Human Factors in Computing  Systems,(pp.2619–2622). NewYork.
Wash, R.R.  (2016). Understanding password choices: How frequently entered passwords are re-used across websites. Proceeding of the 12th Symposium on Usable Privacy and Security, (pp.175–188).