1. Baylor, T. (1996). Media framing of movement protest: The case of the American Indian protest. The Social Science Journal, 33(3), 241–255. https://doi.org/10.1016/S0362-3319(96)90021-X
2. Belim, C. (2014). Eleições europeias 2014, identidade europeia e “agenda inter-media”: O que revelam a imprensa e a televisão nacionais? In M. F. Rollo, J. M. Brandão de Brito, & A. Cunha (Eds.), As eleições para o parlamento europeu em Portugal (pp. 125–184). Almedina.
3. Bell, E., Bryman, A., & Harley, B. (2018). Business research methods. Oxford University Press.
4. Boumans, J., Trilling, D., Vliegenthart, R., & Boomgaarden, H. (2018). The agency makes the (online) news world go round: The impact of news agency content on print and online news. International Journal of Communication, 12, 1768–1789. https://ijoc.org/index.php/ijoc/article/view/7109
5. Boykoff, J. (2007). Limiting dissent: The mechanisms of state repression in the United States. Social Movement Studies, 6(3), 281–310. https://doi.org/10.1080/14742830701666988