Baltes, Paul B. Center for Lifespan Psychology, Max Planck Institute for Human Development, Max Planck Society;
Baltes, P. B. (1998). Theoretical propositions of life-span developmental psychology: On the dynamics between growth and decline. In M. P. Lawton, & T. A. Salthouse (Eds.), Essential papers on the psychology of aging (pp. 86-123). New York: New York University Press.