Kowalczyk, Stanisław. “PDHdtjtd Systemy PDH Ss: Sieci WAN Nowa Poprawka Tstjsttj”. DEMO 12304, no. 130 (February 8, 2022): 45–88. Accessed November 23, 2024. https://ojs34.fimagis.pl/index.php/demo/article/view/69.