Boduszek, D., P. Hyland, J. Pedziszczak, and K. Kielkiewicz. “Criminal Attitudes, Recidivistic Behaviour, and the Mediating Role of Associations With Criminal Friends: An Empirical Investigation Within a Prison Sample of Violent Offenders”. Europe’s Journal of Psychology, Vol. 8, no. 1, Mar. 2012, pp. 18-31, doi:10.5964/ejop.v8i1.296.