1. Lens exfoliation and related problems in Iceland;Als;Nordic Council Arct Med Res Rep,1980
2. The prevalence of glaucoma;Bengtson;Br J Ophthalmol,1981
3. The occurrence of simple and capsular glaucoma in Middle-Norway;Blika;Acta Ophthalmol (Copenh),1987
4. The prevalence of pseudoexfoliation in three separate municipalities of Middle-Norway;Blika;Acta Ophthalmol (Copenh),1987