1. Aiken, L. S., & West, S. G. (1991). Multiple regression: Testing and interpreting interactions. Thousand Oaks: Sage Publications Inc.
2. Bartram, D. (2015). Forced migration and “rejected alternatives”: A conceptual refinement. Journal of Immigrant and Refugee Studies, 13(4), 439–456.
https://doi.org/10.1080/15562948.2015.1030489
.
3. Bertoli, S., & Fernandez-Huertas Moraga, J. (2012). Visa policies, networks and the cliff at the border. IZA Discussion Paper No. 7094, Bonn, GE.
4. Bertoli, S., Brücker, H., & Fernández-Huertas Moraga, J. (2013). The European crisis and migration to Germany: Expectations and the diversion of migration flows. IZA Discussion Paper No. 7170, Bonn, GE.
5. Bertoli, S., Brücker, H., & Fernández-Huertas Moraga, J. (2016). The European crisis and migration to Germany. Regional Science and Urban Economics, 6061–6072.
https://doi.org/10.1016/j.regsciurbeco.2016.06.012
.