References
J. Douglas Porteous
(2007). There was an old man in a tree. Environmental & Architectural Phenomenology 18 (2), pp. 7-8.
(2005). Environmental intangibles. Environmental & Architectural Phenomenology 16 (2), pp. 6.
(2003). Direct action and fields of care. Environmental & Architectural Phenomenology 14 (3), pp. 9-10.
(1992). The mutual impenetrability of world discourse. Environmental & Architectural Phenomenology 3 (1), pp. 10-11.