Skvortsova ES.
Med Sestra. 1988 Feb;47(2):9-11.
PMID: 3367743

[No authors listed]
Tex Nurs. 1989 Jan;63(1):17, 19, 21.
PMID: 2911808

McCarty P.
Am Nurse. 1987 Mar;19(3):3, 6, 10 passim.
PMID: 3645988

[No authors listed]
Nurs Outlook. 1980 Mar;28(3):144, 150.
PMID: 6899055

Siela D, Twibell KR, Keller V.
AACN Adv Crit Care. 2008 Jan-Mar;19(1):66-77. doi: 10.1097/01.AACN.0000310753.39029.b9.
PMID: 18418107

Lewis ML.
J Nurs Educ. 1998 Dec;37(9):398-400.
PMID: 9865894

Wormser B.
Tijdschr Ziekenverpl. 1966 May 01;19(9):315-7.
PMID: 5176946