WASET
    Ishraq A. Al-Fataftah and  Ayman A. Issa,  A Systematic Review for the Latest Development in Requirement Engineering.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2012, vol. 64(4). 583 - 590
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/13420.