1. Carnevali, D.L. (1966) Pre-operative anxiety. American Journal of Nursing, 7, 1536–8
2. Lewis, M.S., Gottesman, D., Gutstein, S. (1979) The course and duration of crisis. Journal of Consulting and Clinical Psychology, 47, 128–134
3. Gottesman D. H., Lewis M.S. (1982) Differences in crisis reactions among cancer and surgery patients. Journal of Consulting and Clinical Psychology, 50, 381–388
4. Healy, J. (1970) Ecology of Cancer Patients Washington D.C. Interdisciplinary Communications Programme, The Smithsonian Institute, p. 184
5. Engel, G. (1974) Grief and grieving. American Journal of Nursing, 61, 93–98