2022 - Buch von Anke Beumann & Theo Fehr:
The role of simplicity (effortlessness) as a prerequisite for the experience of Pure Consciousness - the non-dual state of Oneness: Turiya, - Samadhi in Meditation. JMMR Journal for Meditation and Meditation Research, ed. K. Engel, Peter Lang, Frankfurt/Main-Berlin-Bern-Bruxelles-New York-Oxford-Wien (2002) (568 kb)
Effects of Meditation and Psychotherapy on Psychosomatic Symptoms, Depression, and Subjective Stress - Antagonistic or Complementary Approaches ? (2010) https://www.academia.edu/31929710/
Transcendental Meditation may prevent partial epilepsy, Medical Hypotheses (2006), doi:10.1016/j.mehy.2006.06.008.