1. AccountAbility, 2004. The Accountability Rating 2004-Encoding Accountability. Available at http://www.accountability.org.uk (2004).
2. Sustainability assessment of hydrogen energy systems;Afgan;Int. J. Hydrogen Energy,2004
3. AIChE, 2004. Center for Waste Reduction Technologies (CWRT), Focus Area Sustainability Metrics. Available at http://www.aiche.org/cwrt/pdf/BaselineMetrics.pdf (2004).
4. Systems approach to corporate sustainability—a general Management Framework;Azapagic;Trans. IChemE,2003
5. Developing a framework for sustainable development indicators for the mining and minerals industry;Azapagic;J. Clean. Prod.,2004