1. S. Karch (Ed.), Tainted Money Supply, Vol. 9, No. 3, Forensic Drug Abuse Advisor, Berkeley, CA, 1997, pp. 20–21.
2. Cocaine contamination of United States paper currency;Oyler;J. Anal. Toxicol.,1996
3. Detection of cocaine on various denominations of United States currency;Negrusz;J. Forensic Sci.,1998
4. Community Epidemiology Work Group, Epidemiologic Trends in Drug Abuse. I. Highlights and Executive Summary, National Institutes of Health Division of Epidemiological and Prevention Research, National Institute on Drug Abuse, Rockville, MD, June 1998.
5. Methamphetamine Abuse Alert, NIDA Notes, Vol. 13, No. 6, NIH Publication no. 99-3478, National Institutes of Health, National Institute on Drug Abuse, Bethesda, MD, 15 March 1999.