Twins and the study of rater (dis)agreement
Psychological Methods (2007) - Comment
pubmed: 18179355  doi: 10.1037/1082-989x.12.4.451  issn: 1082-989x  issn: 1939-1463 

Meike Bartels, Dorret I. Boomsma, James J. Hudziak, Toos C. E. M. Van Beijsterveldt, Edwin J. C. G. Van Den Oord