Arnold, Stefan, et al. “[Microcinematographic Studies on Neurodifferentiation and Neurotoxicity in Vitro Using Mouse Embryonic Stem Cells] [Article in German]”. ALTEX - Alternatives to Animal Experimentation, vol. 15, no. 2, May 1998, pp. 59-66, https://altex.org/index.php/altex/article/view/1562.