Psychopathic traits in youth: is there evidence for primary and secondary subtypes?
Journal of Abnormal Child Psychology (2010) - Comment
pubmed: 19941050  doi: 10.1007/s10802-009-9372-7  issn: 1573-2835  issn: 0091-0627 

Zina Lee, Randall T. Salekin, Anne-Marie R. Iselin