K. Rezabeigi and  A. Vafaei and  N. Movahhedinia,  A Web Services based Architecture for NGN Services Delivery.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 1393 - 1397
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/4842.