E. Morgado, C. Carvalho, and L. L. Fernandes, “Education, health, and environment as structural vectors of sustainable development in Portugal”, Br. J. Ed., Tech. Soc., vol. 18, no. 4, pp. 1415–1424, Dec. 2025, doi: 10.14571/brajets.v18.n4.1415-1424.