1. Achenbaum, W. A. (1987). Can gerontology be a science? Journal of Aging Studies, 1(1), 3–18.
2. Achenbaum, W. A. (1995). Crossing Frontiers: Gerontology emerges as a science. New York: Columbia University Press.
3. Alkema, G. E., & Alley, D. E. (2006). Gerontology’s future: An integrative model for disciplinary advancement. The Gerontologist, 46(5), 574–582.
4. Alley, D., Putney, N. M., Rice, M., & Bengtson, V. (2010). The increasing use of theory in social gerontology: 1990–2004. Journal of Gerontology: Social Sciences, 65(B), 583–590.
5. Baars, J., Dannefer, D., Philipson, C., & Walker, A. (2006). Aging, globalization and inequality: The new critical gerontology. Amityville, NY: Baywood Publishing.