1. Relaxation;Benson,1983
2. Stress, Health and Job Satisfaction, a summary of research projects on stress and the psychosocial work environment;Frankenhaeuser,1989
3. Slow breathing increases arterial baroreflex sensitivity in patients with chronic heart failure;Bernardi;Circulation,2002
4. Dong P, Esser A. The ancient Chinese way to health. . ISBN:1-56924-586-7. Marlow Co: Paragon House, NY, 1990. p. 125–6.