Negative parental discipline, conduct problems and callous-unemotional traits: Monozygotic twin differences study
Viding, E., Fontaine, N.M.G., Oliver, B.R., & Plomin, R. (2009). Negative parental discipline, conduct problems and callous-unemotional traits: Monozygotic twin differences study. British Journal of Psychiatry, 195 (5), 414-419.