HEDIGER, Hans-Jörg. Chemieunterricht – gestern und heute. CHIMIA, [S. l.], v. 49, n. 9, p. 325, 1995. DOI: 10.2533/chimia.1995.325. Disponível em: https://www.chimia.ch/chimia/article/view/1995_325. Acesso em: 29 mar. 2024.