1. RESOLVED (Recovery of Solar Valuable Materials, Enrichment and Decontamination), Technical Final Report LIFE04/ENV/D/00047;Berger,2008
2. Clark, C.W., Elkin, E.M., 1946. Process for making selenium dioxide. US Patent 2406666.
3. Drinkard, Jr, W.F., Long, M.O., Goozner, R.E., 1998. Recycling of CIS photovoltaic waste. US Patent 5779877.
4. Ellison, S.L.R., Williams, A.E., 2012. Eurachem/CITAC Guide: Quantifying Uncertainty in Analytical Measurement, third ed.
5. European Commission, 2010. Critical Raw Materials for The EU – Report of the Ad-hoc Working Group on Defining Critical Raw Materials. European Commission.