1. ‘Who discovered Spearman's rank correlation?’;Lovie;Br. J. Math. Statis. Psy.,1995
2. Charles Edward Spearman, F. R. S. (1863-1945);Lovie;Notes and Records of the Royal Society of London,1996
3. The proof and measurement of association between two things;Spearman;Amer. J. Psy.,1904
4. General intelligence objectively determined and measured;Spearman;Amer. Psy.,1904