1. California Code of Regulations (2015) 66261.24. Characteristic of toxicity
2. California Department of Toxic Substances Control (2004) SB20 Report vol 2010
3. Code of Federal Regulations (2011) 40 CFR 262.11—hazardous waste determination
4. Eckelman MJ (2009) Hybrid life cycle energy assessment of commercial LED lamps
5. European Commission Enterprise and Industry (2010) Critical raw materials for the EU. European Commission