WASET
    Oktay Nusratov and  Ramin Rzaev and  Aydin Goyushov,  Assessment the Quality of Telecommunication Services by Fuzzy Inferences System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 97(1). 108 - 120
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10000204.