1. Aksakal, M., & Schmidt-Verkerk, K. (2013). New migration trends in Germany - characteristics, actors and policies. Working paper No. 128. Bielefeld: COMCAD – Center on Migration, Citizen-ship and Development.
2. Arnold, F., Carino, B. V., Fawcett, J. T., & Park, I. H. (1989). Estimating the immigration multiplier: An analysis of recent Korean and Filipino immigration to the United States. International Migration Review, 23(4), 813–838. https://doi.org/10.2307/2546463
3. BAMF (Bundesamt für Migration und Flüchtlinge). (2013). Migrationsbericht 2013. BAMF.
4. Bashi, V. (2007). Survival of the knitted: Immigrant social networks in a stratified world. Stanford University Press.
5. Becker, G. S. (1993). Human capital: A theoretical and empirical analysis with special reference to education. University of Chicago Press.