Vonmont, Heinz, Max Wolfensberger, Hans W. Jäckle, Peter Hofer, Roland Geiser, and Andreas Paul. “Die Sechs Abteilungen”. CHIMIA 48, no. 6 (June 29, 1994): 171. Accessed April 29, 2024. https://www.chimia.ch/chimia/article/view/1994_171.