Halle, Willi, Manfred Liebsch, Dieter Traue, and Horst Spielmann. 1997. “[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 (1):8-15. https://www.altex.org/index.php/altex/article/view/1606.