https://finland.fi/life-society/progressive-prison-keeps-doors-open/
https://www.columbusnavigator.com/ohio-penitentiary-fire-1930/
https://en.wikipedia.org/wiki/Ohio_Penitentiary
https://en.wikipedia.org/wiki/David_McMillan_(smuggler)
https://en.wikipedia.org/wiki/Klong_Prem_Central_Prison
https://en.wikipedia.org/wiki/Billy_Hayes_(writer)
https://en.wikipedia.org/wiki/Silivri_Prison
https://en.wikipedia.org/wiki/San_Pedro_prison
https://www.theguardian.com/uk/2003/apr/27/ukcrime
https://en.wikipedia.org/wiki/Robert_Maudsley
https://en.wikipedia.org/wiki/Anthony_Ray_Hinton
https://www.theguardian.com/society/2021/jan/07/stephen-akpabio-klementowski-i-educated-myself-in-prison-and-changed-my-story
https://www.msn.com/en-xl/news/other/man-who-earned-degree-2-masters-while-in-prison-set-to-bag-phd/ar-BB1863vW
https://www.themarshallproject.org/2014/12/04/the-misleading-math-of-recidivism