1. T. P. Bonczar Prevalence of imprisonment in the U.S. population 1974–2001 Washington D.C.: U.S. Department of Justice. NCJ 197976. (2003).
2. B. Pettit Invisible Men: Mass Incarceration and the Myth of Black Progress (Russell Sage Foundation New York 2012).
3. National Institute of Justice Restrictive Housing in the U.S.: Issues Challenges and Future Directions (U.S. Department of Justice. NCJ 250315 Washington DC 2016).
4. K. Reiter 23/7: Pelican Bay Prison and the Rise of Long-Term Solitary Confinement (Yale Univ. Press New Haven CT 2016).
5. Liman Program & ASCA Reforming restrictive housing: The 2018 ASCA-Liman nationwide survey of time-in-cell New Haven CT: Yale Law School (2018).