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://eejournal.ktu.lt/index.php/elt/article/view/9957.