Pittermann, Wolfgang, Manfred Kietzmann, and Bettina Jackwerth. “[The Isolated Perfused Bovine Udder Skin (BUS) Model: An Integrated in Vitro Model for the Assessment of Skin Penetration and Irritation] [Article in German]”. ALTEX - Alternatives to animal experimentation 12, no. 4 (November 1, 1995): 196-200. Accessed December 2, 2021. https://www.altex.org/index.php/altex/article/view/1654.