Bock, Udo, Thomas Flötotto, and Eleonore Haltner. 2004. “Validation of Cell Culture Models for the Intestine and the Blood-Brain Barrier and Comparison of Drug Permeation”. ALTEX - Alternatives to Animal Experimentation 21 (Supp. 2):57-64. https://www.altex.org/index.php/altex/article/view/2197.