https://www.brown.edu/Departments/Portuguese_Brazilian_Studies/ejph/html/issue1/pdf/baganha.pdf
https://www.bbc.com/news/world-europe-37591756
https://www.yahoo.com/news/russia-cuba-ink-deals-revitalize-193725169.html?fr=sycsrp_catchall
https://www.tribunalconstitucional.pt/tc/file/Relatorio_PR2021_AndreVentura_vf.pdf?src=1&mid=8303&bid=7012