Halle, Willi, Manfred Liebsch, Dieter Traue, and Horst Spielmann. “[Reduction of the Number of Animals Used for the Classification of the Acute Toxicity of Chemicals by Taking into Account Cytotoxicity Data from the Registry of Cytotoxicity (RC)] [Article in German]”. ALTEX - Alternatives to animal experimentation 14, no. 1 (February 1, 1997): 8–15. Accessed May 2, 2024. https://www.altex.org/index.php/altex/article/view/1606.