1. | Study on technical solutions to ensure compatibility, interoperability, quality, reliability and continuity of emergency communications in the Union [documento eletrónico] / European CommissionData Publicação: 2023 Tema: Comunicações Eletrónicas | ||
2. | Study on the current and prospective use of the 900 MHz band by GSM as a technology of reference, considering present and future Union policies [documento eletrónico] / European CommissionData Publicação: 2020 Tema: Comunicações Eletrónicas |