Kjellgren, Anette, Kristin Erdefelt, Lena Werngren, and Torsten Norlander. “Does Relaxation on a Bed of Nails (spike Mat) Induce Beneficial Effects? A Randomized Controlled Pilot Study”. Alternative Medicine Studies 1, no. 1 (March 30, 2011): e5. Accessed April 25, 2024. https://www.pagepress.org/journals/ams/article/view/ams.2011.e5.