Schwinger, Robert H. G., Michael Böhm, Christian Schulz, Ulrich Schmidt, and Erland Erdmann. “[Studies about the Effects of Positive Inotropic and Vasoactive Substances] [Article in German]”. ALTEX - Alternatives to animal experimentation 10, no. 2 (September 1, 1993): 5–19. Accessed May 5, 2024. https://www.altex.org/index.php/altex/article/view/1803.