Bowlby, J. (1969). Attachment and loss: Volume 1. New York, NY: Basic Books.
Center on the Developing Child at Harvard University. (n.d.). Key concepts: Brain architecture. Retrieved from http://developingchild.harvard.edu/science/key-concepts/brain-architecture/
Kaplan, L.J. (1978). Oneness and separateness: From infant to individual. New York, NY: Simon & Schuster.
Kopp, C. B. (1982, March). Antecedents of self-regulation: A developmental perspective. Developmental psychology, 18(2), 199-214.
Piaget, J. (1954). The development of object concept. (M. Cook, Trans.). New York, NY: Basic Books.
Winnicott, D. W. (1953). Transitional objects and transitional phenomena: A study of the first not-me possession. International journal of psychoanalysis, 34, 89-97.
Winnicott, D.W. (1965). The maturational processes and the facilitating environment: Studies in the theory of emotional development. Madison, CT: International Universities Press