1. An, L., Lindermann, M., Qi, J., Shortdridge, A., & Liu, J. (2005). Exploring complexity in a human-environment system: An agent-based spatial model for multidisciplinary and multiscale integration. Annals of the Association of American Geographers,
95(1), 54–79.
2. Angus, I., & Butler, S. (2011). Too many people? Population, immigration, and the environmental crisis. Chicago, IL: Haymarket.
3. Basten, S., Huinink, J., & Klüsener, S. (2012). Spatial variation of sub-national fertility trends in Austria, Germany and Switzerland. Comparative Population Studies,
36(2–3), 615–660.
4. Becker, G. S., Murphy, K. M., & Tamura, R. (1990). Human capital, fertility, and economic growth. Journal of Political Economy,
98(5), S12–S37.
5. Benfield, K. (2011). How Hamburg became Europe’s Greenest City. Citylab. Accessed 1 Apr 2016.