1. Patterns of attachment: a psychological study of strange situation;Ainsworth,1978
2. On the instability of attachment style ratings;Baldwin;Personal Relationships,1995
3. Attachment and loss: separation, anxiety and anger;Bowlby,1973
4. Attachment and loss: sadness and separation;Bowlby,1980
5. A secure base: clinical applications of attachment theory;Bowlby,1988