WASET
    Hasan.O. Farahneh and  Ayman A. Issa,  A Linear Use Case Based Software Cost Estimation Model.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 31 - 35
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/12301.