Elgar, F. J., Pickett, K. E., Pickett, W., Craig, W., Molcho, M., Hurrelmann, K., & Lenzi, M. (2013). School bullying, homicide and income inequality: a cross-national pooled time series analysis. International journal of public health, 1-9. https://www.ncbi.nlm.nih.gov/pubmed/22714137