Miethe, G., and G. Sponer. “[The Development and Approval of Alternative Methods to Bioassays Used for Quality Assurance, a Challenge for the Pharmaceutical Industry and the Authorities] [Article in German]”. ALTEX - Alternatives to Animal Experimentation, vol. 19, no. 3, Aug. 2002, pp. 115-21, https://altex.org/index.php/altex/article/view/1092.