@book{Weizsaecker1992,
  author    = {Weizs{\"a}cker, Ernst U. von},
  title     = {Ecological tax reform : a policy proposal for sustainable development},
  publisher = {Zed Books},
  address   = {London},
  isbn      = {1-85649-096-3},
  pages     = {90},
  year      = {1992},
  language  = {en}
}