References
- Lilley, C. (2018). Giuseppe Penone: A tree in the wood, exhibition guide. Leeds: Yorkshire Sculpture Park.
- Winnicott, D. W. (1965). The maturational processes and the facilitating environment: studies in the theory of emotional development. In M. M. R. Khan (Ed.), The international psycho-analytical library (Vol. 64, pp. 1–276). London: The Hogarth Press and the Institute of Psycho-Analysis.