1. Achermann, C., & Chimienti, M. (2006). Migration, Prekarität und Gesundheit. Ressourcen und Risiken von vorläufig Aufgenommenen und Sans-Papiers in Genf und Zürich. Neuchâtel: Swiss Forum for Migration and Population Studies.
2. Agency for Bulgarians Abroad. (2015). Retrieved November 27, 2015, from http://www.aba.government.bg/?show=english .
3. Amelina, A. (2013). Hierarchies and categorical power in cross-border science: Analyzing Scientists’ transnational mobility between Ukraine and Germany. Southeast European and Black Sea Studies, 13(2), 141–155.
4. Ang, I. (2004). Beyond transnational nationalism: Questioning the borders of the Chinese diaspora in the global city. In B. S. A. Yeoh & K. Willis (Eds.), State/nation/transnation: Perspectives of transnationalism in the Asia-Pacific (pp. 179–198). London: Routledge.
5. Anghel, R. G. (2008). Changing statutes: Freedom of movement, locality and transnationality of irregular Romanian migrants in Italy. Journal of Ethnic and Migration Studies, 34(5), 787–802.