WASET
    Ghada A. El Khayat,  A New Framework and a Model for Product Development with an Application in the Telecommunications Services Sector.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2008, vol. 16(4). 615 - 623
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/4293.