1. Diabetes care and research in Europe. The Saint Vincent Declaration (1990) Diab Med 7:360
2. Österreichisches Statistisches Zentralamt (1990) Demographisches Jahrbuch 1989. Österreichische Staatsdruckerei, Wien
3. Technical Report Series;World Health Organization,1985
4. Liniger C, Albeanu A, Bloise D, Assal JP (1990) The tuning fork revisited. Diab Med 7:859–864
5. Weiss H (1988) Validity of routine ophthalmic photography by a non-mydriatic polaroid fundus camera as a screening procedure for early retinal abnormalities in patients with diabetes mellitus. Pediatr Adolesc Endocr 17:138–146