Pryor, A. (2011) “‘Thinking like a Mystic’: The Unacknowledged Legacy of P.D. Ouspenksy’s Tertium Organum on the Development of Leopold’s ‘Thinking Like a Mountain’”, Journal for the Study of Religion, Nature and Culture, 5(4), pp. 465–490. doi:10.1558/jsrnc.v5i4.465.