Taylor, Katy, Corina Gericke, and Laura Alvarez. “Botulinum Toxin Testing on Animals Is Still a Europe-Wide Issue”. ALTEX - Alternatives to animal experimentation 36, no. 1 (October 10, 2018): 81-90. Accessed March 19, 2019. https://www.altex.org/index.php/altex/article/view/1138.