Ruhdel, Irmela. “[2005 über 2,4 Millionen Versuchstiere in Deutschland] [Article in German]”. ALTEX - Alternatives to animal experimentation 24, no. 1 (February 1, 2007): 60–62. Accessed September 26, 2022. https://www.altex.org/index.php/altex/article/view/793.