Mayer, Gerhard A. “Experimentelle Parapsychologie. Eine Einführung [Experimental Parapsychology. An Introduction] by Stefan Schmidt”. Journal of Scientific Exploration 29, no. 2 (June 6, 2015). Accessed April 25, 2024. https://journalofscientificexploration.org/index.php/jse/article/view/891.