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2. European Council and Parliament. Directive on the energy performance of buildings (recast), 2010/31/EU.
3. Green vertical systems for buildings as passive systems for energy savings;Pérez;Appl Energy,2011
4. Green roofs: a sustainable technology;Cutlip,2006
5. Dinsdale S, Pearen B, Wilson C. Feasibility study for green roof application on queen’s university campus. Queen’s physical plant services; 2006.