Tart, Charles. “More Corrections to Phenomena: A Brief History of the U.S. Government’s Investigations into Extrasensory Perception and Psychokinesis”. Journal of Scientific Exploration 31, no. 2 (June 19, 2017). Accessed November 26, 2024. https://journalofscientificexploration.org/index.php/jse/article/view/1215.