1. Patterns of attachment: A psychological study of the SS;Ainsworth,1978
2. The attachment system in adolescence;Allen,2008
3. On the instability of attachment style ratings;Baldwin;Personal Relationships,1995
4. Attachment and loss. Vol. 1: Attachment;Bowlby,1969
5. Attachment and loss. Vol. 2: Separation: anxiety and danger;Bowlby,1973