6. Watkinson, K. Karpinski, R. Stapley, and P. Fried in "Foundations of Chemical Toxicology", Volume 26, number 2, pp. 111-118, 1988
7. "Looking for the Perfect Brew" by S. Eisenberg, "Science News", Volume 133, April 16, 1988, pp. 252-253.
8. "Bowes and Church's Food values of portions commonly used" by Anna De Planter Bowes. Lippincott, Phila. 1989. Pages 261-2: Caffeine.
9. From Desk Reference to the Diagnostic Criteria from DSM-3-R (American Psychiatric Association, 1987: 305.90
10. OAKLAND, California (UPI) -- Coffee may be good for life.
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