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Li, Xin; Hu, Daning; Dang, Yan; Chen, Hsinchun; Roco, Mihail; Larson, Catherine; Chan, Joyce (2009). Nano Mapper: an Internet knowledge mapping system for nanotechnology development. Journal of Nanoparticle Research, 11:529-552.
Hu, Daning; Chen, Hsinchun; Huang, Zan; Roco, Mihail (2007). Longitudinal study on patent citations to academic research articles in nanotechnology (1976–2004). Journal of Nanoparticle Research, 9(4):529-542.