Panagiev, O. B. “Theoretical Analysis of the Impact of CSO and CTB Distortions on BER Performances in Analog M-QAM HFC CATV Transmission Systems”. Elektronika Ir Elektrotechnika, vol. 96, no. 8, Oct. 2009, pp. 59-61, https://doi.org/10.5755/j02.eie.9957.