1. Immunisation schedules in the countries of the European Union;Guérin;Eurosurveillance,1995
2. WHO Regional Office for Europe, 1999-2000. Disponible en: http://cisid.who.dk/
3. Chief Medical Officer, Chief Nursing Officer, and the Chief Pharmacist. Current vaccine issues: action update. Londres: Department of Health, 1999(PL/CMO/99/5. PL/CON/99/9, PL/CPHO/99/4).
4. ESEN: a comparison of vaccination programmes-Part one: diphtheria;Lévy-Bruhl;Eurosurveillance,1998
5. Immunisation coverage in the European Union;Guérin;Eurosurveillance,1997