Spohr, Christina, Eva Kaufmann, Sibylle Battenfeld, Karin Duchow, Klaus Cussler, Elisabeth Balks, and Max Bastian. “A New Lymphocyte Proliferation Assay for Potency Determination of Bovine Tuberculin PPDs”. ALTEX - Alternatives to animal experimentation 32, no. 3 (August 1, 2015): 201–210. Accessed May 7, 2024. https://www.altex.org/index.php/altex/article/view/225.