Articles and Papers
Bodies of Resistance: Eco-Paganism in the protest movement by Adrian Harris
Goddess Consciousness: Dimensions of Sex, Ecology & the Sacred by Adrian Harris
On Crossing and Not Crossing the Wilderness Boundary by Robert Greenway. Robert is one of the key thinkers on the subject of the wilderness effect and this 1997 paper offers many facinating insights.
What is Deep Ecology? by Chris Johnstone