Shirazi, M. , Jaferian, P. , Elahi, G. , Baghi, H. , Sadeghian, B.. "RUPSec: An Extension on RUP for Developing Secure Systems - Requirements Discipline". World Academy of Science, Engineering and Technology, Open Science Index 4, International Journal of Computer and Systems Engineering (2007), 1(4), 1193 - 1197.