سلوى عبدالنبي إبراهيم على و خميس مسعود سالم احمد. “The Impact of Password Complexity Level on Building a Reliable Model of Keystroke Features”. Journal of Pure & Applied Sciences, vol. 19, no. 5, Oct. 2020, pp. 109-20, doi:10.51984/jopas.v19i5.824.