1. (1) Contreras MA, Ramanathan K, AbuShama J, Hasoon F, Young DL, Egaas B, Noufi R. Diode characteristics in state-of-the art ZnO/CdS/Cu(In1-xGax)Se2 solar cells. Prog Photovoltaics Res Appl 2005;13:209–216.
2. (2) Tolcin AC. Indium. In: U.S. Geological Survey Minerals yearbook—2008. Volume I.—Metals and Minerals. U.S. Geological Survey, [Online]. 2008; Available from: URL: http://minerals.usgs.gov./minerals/pubs/commodity/indium/myb1-2008-indiu.pdf
3. (3) Arumu Publishing Co. Solar cell and silicon raw materials. In: Industrial rare metals, No. 128. Tokyo: Arumu Publishing Co., 2012:8–11 (in Japanese).
4. (4) Arumu Publishing Co. Indium: In: Industrial rare metals, No. 128. Tokyo: Arumu Publishing Co., 2012:134–135 (in Japanese).
5. (5) Homma T, Ueno T, Sekizawa K, Tanaka A, Hirata M. Interstitial pneumonia developed in a worker dealing with particles containing indium-tin oxide. J Occup Health 2003;45:137–139.