Fischer H.
Hautarzt. 1975 Apr;26(4):234.
PMID: 1097372

Heller O.
Arch Psychol (Frankf). 1988;140(3):191-203.
PMID: 3071303

Spearman C.
Am J Psychol. 1987 Fall-Winter;100(3):441-71.
PMID: 3322052

Greenwood JD.
Hist Psychol. 2003 Feb;6(1):70-88.
PMID: 12701575

Schachter S.
Biogr Mem Natl Acad Sci. 1994;64:99-110.
PMID: 11616337

Hilgard ER.
Biogr Mem Natl Acad Sci. 1994;64:397-419.
PMID: 11616335

Rieser JJ, Lappin JS, Jones P.
Perception. 1999;28(4):409-14. doi: 10.1068/p2804ed.
PMID: 10664782