MPT 1317 : code of practice: transmission of digital information over land mobile radio systems / radiocommunications Agency
MPT 1343 : performance specification: system interface specification for radio units to be used with commercial trunked networks operating in band III sub-bands 1 and 2 / Radiocommunications Agency
NF EN 55020 : immunité aux perturbations radioélectriques des récepteurs de radiodiffusion et des appareils associés / Comité Européen de Normalisation Electrotechnique
Meios & publicidade [documento eletrónico] : O jornal independente para profissionais de comunicação e marketing / prop. Workmedia, Comunicação SA