Fejerskov, O. & Bælum, V. (1999). Changes in Prevalence an Incidence of the Major Oral Diseases. In B. Guggenheim & S. Shapiro (Eds.), Oral Biology at the Turn of the Century: : Misconceptions, Truths, Challenges and Prospects, Congress, Interlaken, August 1998 (30th Anniversary of the European Research Group for Oral Biology, ERGOB) (Vol. 1). Karger.
Fejerskov, O. & Bælum, V. (1999). Changes in Prevalence an Incidence of the Major Oral Diseases. In B. Guggenheim & S. Shapiro (Eds.), Oral Biology at the Turn of the Century: : Misconceptions, Truths, Challenges and Prospects, Congress, Interlaken, August 1998 (30th Anniversary of the European Research Group for Oral Biology, ERGOB) (Vol. 1). Karger.