1. European Commission, EACEA, and Eurydice (2016). Promoting Citizenship and the Common Values of Freedom, Tolerance and Non-Discrimination through Education: Overview of Education Policy Developments in Europe Following the Paris Declaration of 17 March 2015.
2. Portuguese Ministry of Education (2022, October 24). Citizenship Education Guidelines. Available online: https://www.dge.mec.pt/sites/default/files/ECidadania/citizenship_education_guidelines.pdf.
3. Portuguese Ministry of Education (2022, October 12). National Education Strategy for Citizenship. Available online: https://www.dge.mec.pt/sites/default/files/Projetos_Curriculares/Aprendizagens_Essenciais/estrategia_cidadania_original.pdf.
4. Portuguese Ministry of Education (2022, December 26). Sustainability for Environmental Education Referential. Available online: http://www.dge.mec.pt/sites/default/files/ECidadania/ref_sustentabilidade.pdf.
5. United Nations (2022, October 25). Summary Points of the Three Leadership Dialogues. Available online: https://unenvironment.widen.net/s/jfvbksmgqw/s50_ld123_summary.