source: - Colin Tudge (2006). “The Tree: A Natural History of What Trees Are, How They Live, and Why They Matter”, p.368, Broadway Books

source: - Colin Tudge (1993). “Last Animals at the Zoo: How Mass Extinction Can Be Stopped”, p.15, Island Press
Topics: Intelligent, Evil, Trying
source: - "Why woodlands are wonderful" by Colin Tudge, www.theguardian.com. October 8, 2010.
Topics: Plato, Thinking, Tree, Plato And Aristotle, Figs