1. Transforming our World , The 2030 Agenda for Sustainable Development , https://sustainabledevelopment.un.org/post2015/transformingourworld/publication , retrieved 09.06.2020
2. https://www.eia.gov/tools/faqs/faq.php?id=99&t=3 , retrieved 22.11.2018
3. Organic Light-Emitting Diodes (OLEDs) , ed. A. Buckley , Woodhead Publishing (Elsevier) , Oxford , 1st edn, 2013
4. Principles of phosphorescent organic light emitting devices
5. J.Emsley , The Elements , Oxford University Press , Oxford , 3rd edn, 1998