Meier, Jürg, and Esther Wieber. “Versuchstierfreie Gehaltsbestimmung Von Oxytocin-Präparaten”. ALTEX - Alternatives to Animal Experimentation, vol. 4, no. 2, Dec. 1987, pp. 12-17, https://www.altex.org/index.php/altex/article/view/1917.