Baltes, Paul B. Center for Lifespan Psychology, Max Planck Institute for Human Development, Max Planck Society;
Dixon, R. A., Kramer, D., & Baltes, P. B. (1985). Intelligence: A life-span developmental perspective. In B. B. Wolman (Ed.), Handbook of intelligence: Theories, measurements, and applications (pp. 301-350). New York: Wiley.