1. Agamben, G. (1998) Homo Sacer: Sovereign Power and Bare Life. Translated by Daniel Heller-Roazen. Stanford: Stanford University Press.
2. Antonovsky, A. (1993) The structure and properties of the sense of coherence. Social Science and Medicine 36: 725–733.
3. Arendt, H. (1973) The Origins of Totalitarianism. New York: Houghton Mifflin Harcourt.
4. Aspinall, P. J. (2014) Hidden Needs: Identifying Key Vulnerable Groups in Data Collections; Vulnerable Migrants, Gypsies and Travellers, Homeless People, and Sex Workers. University of Kent: Centre for Health Services Studies. https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/287805/vulnerable_groups_data_collections.pdf , accessed 2 September 2015.
5. Atkinson, P. (2014) For Ethnography. London: Sage.