1. Do we need extensive vaccinations against diphtheria in Finland (in Finnish);Eskola;Duodecim,1994
2. The immunity against diphtheria among adults in Finland (in Finnish);Ölander;Kansanterveyslehti,1997
3. Vaccination of adults against diphtheria still necessary (in Finnish);Ölander;Kansanterveyslehti,2002
4. Tetanus toxoid: what determines reaction proneness?;Levine;J Infect Dis,1981
5. Vaccines;Plotkin,2008