1. The ecological relativity and plasticity of psychological aging: Convergent perspectives of cohort effects and operant psychology;Baltes;Zeitschrift fur Experimentelle und Angewandte Psychologie,1977
2. Longitudinal and cross-sectional sequences in the study of age and generation effects;Baltes;Human Development,1968
3. Strategies for psychological intervention in old age: A symposium;The Gerontologist,1973
4. Life-span developmental psychology: Some converging observations on history and theory;Baltes,1979
5. Cohort effects in developmental psychology;Baltes,1979