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http://dx.doi.org/10.1016/j.matlet.2007.03.036
The following have contributed to this page: Hui-Ming Cheng and Professor Jianxin Geng

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http://dx.doi.org/10.1016/j.matlet.2007.03.036
The following have contributed to this page: Hui-Ming Cheng and Professor Jianxin Geng