Speck P.
Nurs Times. 1992 Aug 5-11;88(32):22.
PMID: 1502094

Wake M, Vogel G.
Dimens Crit Care Nurs. 1985 May-Jun;4(3):132-4.
PMID: 3847339

Puetz BE.
J Nurs Staff Dev. 1990 Mar-Apr;6(2):59.
PMID: 2329381

Sánchez-Ocaña R.
Rev Enferm. 1984 Nov;7(75):37-9.
PMID: 6568757

Darbyshire P.
Nurs Times. 1993 May 12-18;89(19):57.
PMID: 8321662

Rogers JA.
Sygeplejersken. 1983 May 25;83(20):16-9.
PMID: 6555944

Tao M.
Kango Tenbo. 1984 Mar;9(3):252-9.
PMID: 6562315