Gruber, F. P., I. Kuhlmann, and G. Wolters. “Tierschutzrelevante Veranstaltungen in Der Studentenausbildung”. ALTEX - Alternatives to Animal Experimentation, vol. 8, no. 1, Apr. 1991, pp. 17-18, https://www.altex.org/index.php/altex/article/view/1847.