1. Armaroli N, Balzani V (2008) Energia per l’astronave Terra. Zanichelli, Bologna
2. Armaroli N, Balzani V (2011) Energy for a sustainable world. Wiley-VCH, Weinheim
3. Bauman Z (2005) Liquid life. Policy Press, Cambridge
4. Cini M (1994) Un paradiso perduto. Feltrinelli, Milano
5. Daly HE (1977) Steady state economics, 2nd edn. Island Press, Washington DC (1991)