1. Dobrin, R., Kirsch, C.,. Kirsch, S., Pierrakos, J., Schwartz, E., Wolff, T., and Zeira, Y.: Experimental measurements of the human energy field, in S. Krippner (ed.), psychoenergetic Systems, 1979, pp. 277 – 230.
2. Ibison, M.: Personal communication.
3. Sauermann, G., Hoppe, U., and Stab, F.: In vivo chemiluminescence of human skin, Photochem. Photobiol. (1993), 41S.
4. Ruth, B.:Experimental Investigations on Ultraweak Photon Emission, in F.A. Popp, G. Becker, H.L. König and W. Peschka (eds.), Electromagnetic Bio-Information, Urban & Schwarzenberg, MünchenWien-Baltimore, 1979, pp. 107 – 122.
5. Cohen, S., and Popp, F.A.: Biophoton emission of the human body, J. Photochem. Photobiol. B: Biol.
40 (1997), 187–189.