1. Carnegie Mellon University Green Design Institute (2008) Economic input–output life cycle assessment (EIO-LCA), US 1997 Industry Benchmark model [Internet]. Available at: http://www.eiolca.net/ . Accessed 01 Feb 2010
2. Cicas G et al (2007) A regional version of a US economic input–output life-cycle assessment model. Int J Life Cycle Assess 12(6):365–372
3. City of Helsinki (2008) Theme Report 1/2008: Energy efficiency of Helsinki’s building stock is improving, City of Helsinki, Environment Centre. Available at: http://www.hel2.fi/ymk/julkaisut/oppaat/esitteet/teemakatsaus_engl.pdf . Accessed 15 Apr 2010
4. City of Porvoo (2009) Facts about Porvoo. Available at: http://www.porvoo.fi/index.php?mid=335 . Accessed 02 Oct 2009
5. Dodman D (2009) Blaming cities for climate change? An analysis of urban greenhouse gas emissions inventories. Environ Urban 21(1):185–201