Psychou, D., D. Kokaridas, N. Koulouris, Y. Theodorakis, and C. Krommidas. “The Effect of Exercise on Improving Quality of Life and Self-Esteem of Inmates in Greek Prisons”. Journal of Human Sport and Exercise, vol. 14, no. 2, May 2019, pp. 374-8, doi:10.14198/jhse.2019.142.10.