Gruber, Franz P., and Horst Spielmann. “[Replacement of the Frog Test in Physiology Teaching by the Myograph: Practical Validation in Germany] [Article in German]”. ALTEX - Alternatives to Animal Experimentation, vol. 13, no. 4, Nov. 1996, pp. 190-4, https://altex.org/index.php/altex/article/view/1620.