Inderpreet Kaur and  Neena Gupta,  Statistical Analysis of Different Configurations of Hybrid Doped Fiber Amplifiers.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2009, vol. 28(4). 655 - 660
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/13354.