1. Le mal de Naples. Histoire de la syphilis. Médecine et Histoire;Quetel,1986
2. De la vénéréologie aux maladies sexuellement transmissibles;Janier;Ann Dermatol Venereol,1989
3. Global challenge of antibiotic – resistant Treponema pallidum;Stamm;Antimicrob Agents Chemother,2010
4. ESSTI network;Savage;Syphilis Eurosurveillance,2009
5. CDC (Centers for Disease control and Prevention) Sexually Transmitted diseases Surveillance 2008. http://www.cdc.gov/std/stats08/syphilis.htm.