<ul><li><a href=https://archiwum.uke.gov.pl/ target=_blank>Decision of the Office of  Electronic Communications(Decyzja; Markets 3-6/2003, DART-SMP-6041-7/14(30), DART-SMP-6041-8/14(30), DART-SMP-6041-9/14(30) and DART-SMP-6041-10/14(30) , 29 April 2015)</a></li><li><a href=https://bip.uke.gov.pl/decyzje/decyzje-smp/ target=_blank>Office of Electronic Communications post 2018 decision website</a></li><li>.</li></ul>