Schimmel, Dietrich. “[The Importance of Endotoxin Producing Bacterias for Practical Purposes] [Article in German]”. ALTEX - Alternatives to animal experimentation 11, no. Supp. 1 (January 1, 1994): 21–23. Accessed May 5, 2024. https://www.altex.org/index.php/altex/article/view/2036.