Irwing, P.; Lynn, R. (2005). ”Sex differences in means and variability on the progressive matrices in university students: A meta-analysis”. British Journal of Psychology 96 (Pt 4): sid. 505–524. doi:. PMID 16248939.
Irwing, P.; Lynn, R. (2005). ”Sex differences in means and variability on the progressive matrices in university students: A meta-analysis”. British Journal of Psychology 96 (Pt 4): sid. 505–524. doi:10.1348/000712605X53542. PMID 16248939.