Steel K., Ljunggren G., Topinkova E., Morris J.N, Vitale C., Parzuchowski J., Nonemaker S., Frijters D.H, Rabinowitz T., Murphy K.M et al..  2003.  The RAI-PC: An assessment instrument for palliative care in all settings. American Journal of Hospice & Palliative Care. 20(3):211-219.

Steel K., Vitale C., Whang P..  2000.  Annotated bibliography of palliative care and end of life care. J Am Geriatr Soc. 48(3):325-32.