1. Abs, J., & Veldhuis, R. (2006). Indicators on active citizenship for democracy: The social, cultural and economic domain. CRELL-Network on Active Citizenship for Democracy at the European Commission’s Joint Research Centre in Ispra.
2. Aebi, M. F., & Delgrande, N. (2010). Council of Europe annual penal statistics 2010 space I survey 2010, PC-CP (2012) 1, Lausanne, http://www.coe.int/t/DGHL/STANDARDSETTING/CDPC/CDPC%20documents/SPACE-1_2010_English.pdf (12/15).
3. Armstrong, R., & Ludlow, A. (2016). Educational partnerships between universities and prisons: How learning together can be individually, socially and institutionally transformative. Prison Service Journal, 225, 9–17.
4. Ash, S. L., & Clayton, P. H. (2009). Generating, deepening, and documenting learning: The power of critical reflection in applied learning. Journal of Applied Learning in Higher Education, 1(1), 25–48.
5. Bahr, S. J., Harris, L., Fisher, J. K., & Harker, A. A. (2010). Successful reentry: What differentiates successful and unsuccessful parolees? International Journal of Offender Therapy and Comparative Criminology, 54(5), 667–692.