◆Encyclopedia of Natural Healing 1997 Alive Publishing, Inc., Burnaby, Canada, 1997, pp. 400-07 Gursche, Siegfried and Rona Zoltan
◆Biological resonance and the state of th organism in Potentiating Health and th Crisis of the Immune System 1997 edited by Mizrahi, et al. Plenum Press, NY, 1997, pp. 223-41 Ladnyiczky Gabor and Nieberl, Jozsef