1. Acharya, S. (2016, March 29). Gold iPhone SE drives 3.4 million pre-orders in China. International Business Times. Retrieved October 15, 2016, from http://www.ibtimes.co.uk/gold-iphone-sedrives-3-4-million-pre-orders-china-1552043
2. Amos, J. (2014, September 24). Why India’s Mars mission is so cheap—and thrilling. BBC News. https://www.bbc.com/news/science-environment-29341850
3. Bengtsen, P., & Kelly, A. (2016, July 28). Vauxhall and BMW among car firms linked to child labour over glittery mica paint. The Guardian. Retrieved October 15, 2016, from https://www.theguardian.com/global-development/2016/jul/28/vauxhall-bmw-car-firms-linked-child-labour-mica
4. Brady, P., & Cummings, M. (2010). Differential response to circularly polarized light by the jewel scarab beetle Chrysina gloriosa. The American Naturalist, 175(5), 614–620.
5. Chiou, T. H., Place, A. R., Caldwell, R. L., Marshall, N. J., & Cronin, T. W. (2012). A novel function for a carotenoid: Astaxanthin used as a polarizer for visual signalling in a mantis shrimp. Journal of Experimental Biology, 215(4), 584–589.