Mendes, Mariana S.; Dennison, James (19. juni 2020). «Explaining the emergence of the radical right in Spain and Portugal: salience, stigma and supply». West European Politics44 (4): 752–775. doi:10.1080/01402382.2020.1777504.
«'Politico' highlights poor adhesion of Portugal to the populist movement» (på portugisisk). Arkivert frå originalen 29. mai 2019. Henta 29. mai 2019. «News article on the campaign for Europeans Elections refers to the meager chance that the coalition "Basta!" to elect a MEP and advances the reasons for the country to resist the wave of far-right that reached the rest of Europe.»
«'Politico' highlights poor adhesion of Portugal to the populist movement» (på portugisisk). Arkivert frå originalen 29. mai 2019. Henta 29. mai 2019. «News article on the campaign for Europeans Elections refers to the meager chance that the coalition "Basta!" to elect a MEP and advances the reasons for the country to resist the wave of far-right that reached the rest of Europe.»
