Halfens R, Smeets H, Philipsen H.
TVZ. 1988 Apr 28;42(9):284-7.
PMID: 3133834

Fleming JW.
Am J Nurs. 1983 Feb;83(2):279-80.
PMID: 6549896

Kroepsch RH.
NLN Publ. 1968;(15):2-10.
PMID: 5189225

Holder S.
Nurs Stand. 1990 Jan 17-23;4(17):18-9.
PMID: 2107416

Batey MV.
Nurs Forum. 1969;8(1):5-16.
PMID: 5192225

Thorbjørnsrud EM.
Sykepleien. 1985 Feb 05;72(3):10-7.
PMID: 3847195

Akinsanya J.
Nurs Times. 1987 May 13-19;83(19):68.
PMID: 3648716