1. Beebe, B. Ontogeny of positive affect in the third and fourth months of the life of one infant. Doctoral dissertation, Columbia University, University Microfilms, 1973.
2. Beebe, B., & Bennett, S. Early facial expressions. Unpublished paper, New York State Psychiatric Institute, 1975.
3. Bell, S. M. The development of the concept of the object as related to infant-mother attachment. Child Development, 1970: 41, 291–311.
4. Benjamin, J. Further comments on some developmental aspects of anxiety. In H. Goshell (Ed.), Counterpoint: Libidinal object and subject. New York: International Universities Press, 1963.
5. Benjamin, J. Developmental biology and psychoanalysis. In N. Greenfield & W. Lewis (Eds.), Psychoanalysis and current biological thought. Madison: University of Wisconsin Press, 1963.