VESTERINEN, Veli-Matti. Helsinki framework: Co-design of principles for sustainability education. LUMAT-B: International Journal on Math, Science and Technology Education, [S. l.], v. 2, n. 3, p. 15–18, 2017. Disponível em: https://journals.helsinki.fi/lumatb/article/view/1163. Acesso em: 22 marras. 2024.