203 papers have been added from the 2009 review by Betsy Levy Paluck and Donald Green. 

Paluck, E. L., & Green, D. P. (2009). Prejudice reduction: what works? A review and assessment of research and practice. Annual Review of Psychology, 60, 339–367. https://doi.org/10.1146/annurev.psych.60.110707.163607