1. Outbreak of paralytic poliomyelitis in Finland: widespread circulation of antigenically altered poliovirus type 3 in a vaccinated population;Hovi, T.; Cantell, K.; Huovilainen, A.;Lancet,1986
2. Sero-immunity to poliovirus;Mortimer, P.P.; Cunningham, P.;children and young women: England; J Hyg(Lond),1972
3. Protection against poliomyelitis;Codd, A.A.; White, E.;Lancet,1977
4. Immunity of children to diphtheria, tetanus and poliomyelitis;Bainton, D.; Freeman, M.; Magrath, D.I.; Sheffield, F.; Smith, J.W.G.;BrMedJ,1979
5. Prevalence of antibodies to poliovirus in 1978 among subjects aged 0-88 years;Roebuck, M.; Chamberlain, R.;BrMedJ,1982