Johnson M.
Fla Nurse. 1992 Sep;40(8):8-9, 11.
PMID: 1397379

Gaze H.
Nurs Times. 1991 May 15-21;87(20):16-7.
PMID: 2034528

Thornton L.
Nurs Times. 1983 Jun 29-Jul 5;79(26):11-2.
PMID: 6554638

Rayner C.
Nurs Times. 1984 Aug 29-Sep 4;80(35):28-31.
PMID: 6567107

Fiske ST.
Annu Rev Psychol. 1993;44:155-94. doi: 10.1146/annurev.ps.44.020193.001103.
PMID: 8434891

Chinn PL.
ANS Adv Nurs Sci. 1990 Jul;12(4):viii.
PMID: 2112885

Cunningham SJ, Macrae CN.
Br J Psychol. 2011 Aug;102(3):598-614. doi: 10.1111/j.2044-8295.2011.02023.x. Epub 2011 Apr 19.
PMID: 21752009