1. La seguridad de las vacunas;Salleras;Vacunas,2003
2. Regulation and testing of vaccines;Parkman,1994
3. Initial clinical evaluation of new vaccine candidates;Herrington,1990
4. Longer term evaluation of vaccine efficacy. Methodological issues for phase IV trials;Clemens,1990
5. Monitoring system for adverse events following immunization;Stetler;Vaccine,1987