1. Environmental Product Declarataion. ISO 14025: Environmental labels and declarations – Type III environmental declarations – Principles and procedures. ISO – International Organization for Standardization. Geneva: ISO 2006.
2. Decision making with the analytic hierarchy process;Saaty;Pittsburg: Int. J. Services Sciences,2008
3. Construction Product Directive 89/106/EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction products. Official Journal L 040; 1989. p. 12-26.
4. European Union: Regulation (EU) No 305/2011 of the European Parliament and the Council of 9 March 2011 laying down harmonised conditions for the marketing of building products and repealing Council Directive 89/106/EEC. (CPR) (Official Journal of the European Union) Brussels: 2011.
5. Annex31: http://www.iisbe.or g/annex31/index.html.