Annual report 2020 [documento eletrónico] / Czech Telecommunication Office
Technology, media and telecommunications predictions 2022 [documento eletrónico] / Deloitte Touche Tohmatsu
Tech trends 2022 [documento eletrónico] / Deloitte Touche Tohmatsu
Cybersecurity [documento electrónico] : special report / Developing Telecoms
Relatório e contas 2020 [documento electrónico] / NOS
Creating smart cities and society [documento eletrónico] : employing information and communication technologies for sustainable social and economic development / International Telecommunication Union