HE, Xinyuan. A Key Research Case for Promoting Education for Sustainable development: The Case of Okayama, Japan. International Journal of Social Sciences and Public Administration, U.K., v. 3, n. 3, p. 89–92, 2024. DOI: 10.62051/ijsspa.v3n3.10. Disponível em: https://wepub.org/index.php/IJSSPA/article/view/2275. Acesso em: 24 jul. 2026.