Schimmel, Dietrich, et al. “[Detection of Pasteurella Multocida Toxin - a Comparison of in Vitro and in Vivo Methods] [Article in German]”. ALTEX - Alternatives to Animal Experimentation, vol. 11, no. Supp. 1, Jan. 1994, pp. 59-61, https://www.altex.org/index.php/altex/article/view/2044.