1. Aspen Plus (no date). Available at: https://www.aspentech.com/en/products/engineering/aspen-plus (Accessed: 21 Jan 2020)
2. Ayres RU, Ayres EH (2010) Crossing the Energy Divide. Moving from Fossil Fuel Dependence to a Clean-Energy Future. Pearson Education Inc., Upper Saddle River, New Jersey
3. Ayres RU, Ayres LW, Warr B (2003) Exergy, power and work in the US economy, 1900–1998. Energy 28(3):219–273. https://doi.org/10.1016/S0360-5442(02)00089-0
4. BASF (2012) BASF report economic, environmental and social performance. Ludwigshafen. Available at: http://www.basf.com/group/corporate/nl_NL/function/conversions:/publishdownload/content/about-basf/facts-reports/reports/2012/BASF_Report_2012.pdf
5. BASF (2017) BASF Report 2017. Economic, environmental, and social performance. Ludwigshafen