1. 1) 廣川満哉: ニッケルデマンド分析 2011, (JOGMEC, Japan, 2011), pp.377-389.
2. 2) Heinz H. Pariser: End-Use of Nickel 2001-2011 Part I, (Heinz H. Pariser, Alloy Metals & Steel Market Research, Germany, 2011), pp.12-32.
3. 3) T.G.Goonan and P.H.Kuck: Nickel Statistics US Geological Survey, (USGS National Minerals Information Center, USA, 2010), pp.1-10.
4. 4) 鉱物資源マテリアルフロー2010 ニッケル, (JOGMEC, 東京, 2011), pp.90-106.
5. 5) LME NICKEL PRICE, (Mitsui & Co., Ltd, New Metals Division, Japan, 2012.3.5)