Helmus, Hanson, Babchishsin, & Thornton (2015). Sex offender risk assessment with the Risk Matrix 2000: Validation and guidelines for combining with the STABLE-2007.
Helmus, Babchishin, & Hanson (2013). The Predictive accuracy of the Risk Matrix 2000: A meta-analysis.
Wakeling, Howard, & Barnett (2011). Comparing the validity of the RM2000 scales and the OGRS3 for predicting recidivism by internet sexual offenders.