İbrahimov, B., E. Hashimov, A. Talibov, and A. Hasanov. “RESEARCH AND ANALYSIS INDICATORS FIBER-OPTIC COMMUNICATION LINES USING SPECTRAL TECHNOLOGIES”. Advanced Information Systems, vol. 6, no. 1, Apr. 2022, pp. 61-64, doi:10.20998/2522-9052.2022.1.10.