An alternative Cattell-Horn-Carroll (CHC) factor structure of the WAIS-IV: age invariance of an alternative model for ages 70-90
Psychological Assessment (2013) - Comment
pubmed: 23244639  doi: 10.1037/a0031175  issn: 1939-134x  issn: 1040-3590 

Christopher R. Niileksela, Matthew R. Reynolds, Alan S. Kaufman