@book{WeizsaeckerLovinsLovins1997,
  author    = {Weizs{\"a}cker, Ernst U. von and Lovins, Amory B. and Lovins, L. Hunter},
  title     = {Factor 4 : duplicar el bienestar con la mitad de los recursos naturales},
  publisher = {Galaxia Gutenberg},
  address   = {Barcelona},
  pages     = {429},
  year      = {1997},
  language  = {es}
}