SINGER, Sydney Ross; MACDONALD, Allyson. Four phases in sustainability education: A  design framework for learning, research and planning. LUMAT-B: International Journal on Math, Science and Technology Education, [S. l.], v. 2, n. 3, p. 19–25, 2017. Disponível em: https://journals-21.hulib.helsinki.fi/lumatb/article/view/1164. Acesso em: 14 marras. 2024.