(en) Andrew Dobson, The Politics of Nature : Explorations in Green Political Theory, Routledge, , 8, 9, 14 (ISBN0-415-12471-9, lire en ligne)
(en) Nigel Thrift Richard Peet, New Models in Geography - Vol 1 : The Political-Economy Perspective, Routledge, , 90, 97–99 (ISBN0-04-910101-3, lire en ligne)
