1. Infectious diseases of humans;Anderson,1991
2. Drugs, sex and HIV: a mathematical model for New York City;Blower;Philosophical Transactions of the Royal Society London, Series B,1991
3. Centers for Disease Control (2001). Congenital syphilis—United States, 2000, 50, 573–577. http://archderm.ama-assn.org/issues/v137n11/ffull/dmm10006-1.html
4. Mathematical epidemiology of infectious diseases: model building, analysis and interpretation;Diekmann,2000
5. European Monitoring Centre for Drugs and Drug Addiction (EMCDDA) (2002). 2002 Annual report on the state of the drugs problem in the European Union and Norway. Lisbon. Available: http://annualreport.emcdda.eu.int).