Steindal S.A, Ranhoff A.H, Bredal I.S, Sorbye L.W, Lerdal A..  2013.  Last three days of life in the hospital: a comparison of symptoms, signs and treatments in the young old and the oldest old patients using the Resident assessment instrument for palliative care. International Journal of Older People Nursing. 8(3):199-206.

Intrator O., Castle N.G, Mor V..  1999.  Facility characteristics associated with hospitalization of nursing home residents: results of a national study. Medical Care. 37(3):228-37.

Castle N.G, Mor V..  1996.  Hospitalization of nursing home residents: a review of the literature, 1980-1995. Medical Care Research & Review. 53(2):123-48.