1. Roof and the Environment;Heffernan,2003
2. Korean Forest Service 2009. The Fifth National Forest Plan, 2009, web accessed at http://english.forest.go.kr/.
3. Chicago Climate Exchange: CO2 Market Data 2011, Available from: http://www.chicagoclimatex.com/market/data/summary.jsf (accessed October 2011).
4. Green roof valuation: a probabilistic economic analysis of environmental benefits;Clark;Environmental Science and Technology,2008
5. Research for Development Zero Energy-Eco School Model (II);Korean Educational Development Institution (KEDI),2009