1. Alexander, C. N., Boyer, R. W., & Alexander, V. K. (1987). Higher states of consciousness in the Vedic Psychology of Maharishi Mahesh Yogi: a theoretical introduction and research review. Modern Science and Vedic Science, 1, 89–126.
2. Alexander, C. N., & Langer, E. J. (1990). Higher stages of human development: Perspectives on adult growth. Oxford: Oxford University Press.
3. Alexander, C. N., Rainforth, M. V., & Gelderloos, P. (1991). Transcendental meditation, self-actualization, and psychological health: a conceptual overview and statistical meta-analysis. Journal of Social Behavior and Personality, 6(5), 189–248.
4. Anderson, D. (1983). Meditation as a treatment for primary dysmenorrhea among women with high and low absorption scores. Doctoral Dissertation, Texas Tech University, Lubbock, TX.
5. Austin, J. H. (1998). Zen and the brain. Cambridge: MIT Press.