1. “UNEP - 2013 - Metal recycling opportunities, limits, infrastruc.pdf.”.
2. “Graedel et al. - 2011 - Recycling rates of metals a status report.pdf.”.
3. “Union - 2017 - Study on the review of the list of critical raw maw materials.pdf.”.
4. Tantalum and niobium;Linnen,2013
5. “Self-Driving Car Hardware|NVIDIA DRIVE.” [Online]. Available:https://www.nvidia.com/en-us/self-driving-cars/drive-platform/hardware/. [Accessed: 24-Sep-2019].