ZELLWEGER, Manfred; BAUMBERGER, Franz. Burgdorf - Jiangmen - unsere China-Beziehung. CHIMIA, [S. l.], v. 48, n. 6, p. 240, 1994. DOI: 10.2533/chimia.1994.240. Disponível em: https://www.chimia.ch/chimia/article/view/1994_240. Acesso em: 30 apr. 2025.