1. Materials and design – the art and science of material selection in product design;Ashby,2010
2. Material considerations in product design: a survey on crucial material aspects used by product designers;Karana;Mater Des,2008
3. Defining critical materials;Graedel,2009
4. UK Government. Department for Business Innovation and Skills and Department for Environment, Food and Rural Affairs, Resource Security Action Plan: making the most of valuable materials; 2012.
5. Manifesto for a Resource Efficient Europe. European Commission – MEMO/12/989 17/12/2012 [accessed October 2013].