Bulletin London Mathematical Society 42 ( 2 ): 275 - 281 , 2010
X. Fang, C. Jacquemin, F. Vernier and B. Luo
Information Technology Journal 8 ( 1 ): 1 - 15 , 2009
C Wang, G Xie, B Cheng, L Du, L Shi, L Tan, Q Shu and X. Fang
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