Nacionais
Anatel Dados
CADE – Conselho Administrativo de Defesa Econômica
Conselho de Comunicação Social
Observatório Brasileiro do Cinema e do Audiovisual – ANCINE
Internacionais
International Media Concentration Research Project
The State of Newsmedia 2014
FreePress – Who Owns the Media?
Australian Communications and Media Authority
Article 19 – Concentration
Observacom
World Information Org.
Consumer Information of America
Media Reform Coalition