1. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,1987
2. Pathological mourning and childhood mourning;Bowlby;Journal of the American Psychoanalytical Association,1962
3. Attachment and loss: Volume 1, attachment;Bowlby,1969
4. Attachment and loss: Volume 2, separation;Bowlby,1973
5. Attachment and loss: Volume 3, loss, sadness, and depression;Bowlby,1980