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Xu X, Allen CS, Chuang C, Canary JW.Xu X, et al.Acta Crystallogr C. 1998 May 15;54 ( Pt 5):600-1. doi: 10.1107/s0108270197017733.Acta Crystallogr C. 1998.PMID: 9636993
Xu X, Gabor NM, Alden JS, van der Zande AM, McEuen PL.Xu X, et al.Nano Lett. 2010 Feb 10;10(2):562-6. doi: 10.1021/nl903451y.Nano Lett. 2010.PMID: 20038087