1. Steen B.: The elderly in the changing world. Neurologija 39 (Suppl. 2): 19–20, 1990.
2. Steen B.: Environment and the elderly — the European perspective. Australian Rotary Health Research Fund IVth International Conference: Environment, Health and the Elderly. Australian National University, Canberra, November 21-24, 1990.
3. Steen G., Berg S., Steen B.: Cognitive function in 70-year-old men and women. A 16-year cohort difference population study. Aging Clin Exp. Res. 10: 120–126, 1998.
4. Österberg T., Carlsson G.E., Mellström D., Sundh V.: Cohort comparisons of dental status in the adult Swedish population between 1975 and 1981. Community Dent. Oral Epidemiol. 19: 195–200, 1991.
5. de Groot C.P.G.M., Enzi G., Perdiago A.L., Deurenberg P.: Longitudinal changes in anthropometric characteristics of elderly Europeans. Eur. J. Clin. Nutr. 50 (Suppl.): 9–15, 1996.