HIETALA, T.; LEHTINEN, N.; KOKKINEN, T. Metallit – Metallien jalostuksen opetus peruskoulussa: Metals – Teaching metal refining in basic education. LUMAT-B: International Journal on Math, Science and Technology Education, [S. l.], v. 4, n. 1, p. 155–176, 2019. Disponível em: https://journals.helsinki.fi/lumatb/article/view/1141. Acesso em: 19 huhti. 2024.