1. Speeksel: van waterige tot viskeuze mondvloeistof;Van Nieuw Amerongen,1988
2. Factors influencing salivary flow rate and composition;Edgar,1990
3. The diagnostic uses of saliva;Mandel;J. Oral Pathol. Med.,1990
4. Oral microbial ecology;Schonfeld,1992
5. The oral cavity as an immunological entity;Smith,1992