1. Doka KJ. Disenfranchised grief: recognising hidden sorrow. San Francisco: Jossey Bass; 1989.
2. Doka KJ. Disenfranchised grief: new directions, challenges and strategies for practice. Champaign, IL: Research Press Publishers; 2001.
3. Strobe MS, Schut HA. The dual process model of coping with bereavement: overview and update. Death Stud. 1999;23:197–224.
4. Kubler-Ross E. On death and dying. New York: Routledge; 1969.
5. Bowlby J. Attachment and loss. New York: Basic Books; 1980.