1. Kennedy et al. Dose dependent change in cognitive performance and mood following acute administration of Ginseng to healthy young volunteers. Division of Psychology, 2001
2. Forgo I, M.D and A.M. Kirehderfer. The effective of different ginsenoside concentration on physical work capacity.
3. Phyllis A. Balch. Stress. In: a member of Penguin Group (USA) Inc. Prescription for Nutritional Healing. Forth Edition. New York: AVERY; 2006. p. 85.