By Liu Yuji   in Journal of Difference Equations and Applications

ISSN:1023-6198|13|12|1105-1114

Taylor & Francis Ltd‎(2007)‎

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By Liu Yuji   in Applicable Analysis

ISSN:0003-6811|92|1|72-95

Taylor & Francis Ltd‎(2013)‎

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By Liu Yuji   in Applicable Analysis

ISSN:0003-6811|84|11|1079-1094

Taylor & Francis Ltd‎(2005)‎

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