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2. International Organization for Standardization. Environmental Management—Life Cycle Assessment—Requirements and Guidelines, ISO/FDIS 14044; 2006.
3. British Standards Institute. Specification for the Assessment of the Life Cycle Greenhouse Gas Emissions of Goods and Services, Publicly Available Specification 2050:2008; 2008.
4. World Resources Institute and World Business Council for Sustainable Development. Greenhouse Gas Protocol: Product Life Cycle Accounting and Reporting Standard; 2011.
5. International Organization for Standardization. Carbon Footprint of Products—Requirements and Guidelines for Quantification and Communication, ISO/FDIS 14067; 2013.