1. Carbon Trust 2015 Is GRI's G4 too ambitious for business http://www.carbontrust.com/news/2013/05/is-gris-g4-too-ambitious-for-business/
2. Beyond the business case for corporate sustainability;Dyllick;Business Strategy and the Environment,2002
3. Ernst and Young and Boston College Centre for Corporate Citizenship 2014 Value of sustainability reporting http://www.ey.com/Publication/vwLUAssets/EY_-_Value_of_sustainability_reporting/$FILE/EY-Value-of-Sustainability-Reporting.pdf
4. Ethical Corporation 2015 Top sustainability trends for 2015 http://www.ethicalcorp.com/business-strategy/top-sustainability-trends-2015
5. Global Reporting Dialogue 2015 Navigating the corporate reporting landscape http://corporatereportingdialogue.com/wp-content/uploads/2015/05/CRD-Mapping-Document_website_070515.pdf