GE Bin , XUE Xiao-Ping , ZHOU Qiang-Mei . EXISTENCE OF PERIODIC SOLUTIONS FOR A DIFFERENTIAL INCLUSION SYSTEMS INVOLVING THE p(t)-LAPLACIAN[J]. Acta mathematica scientia, Series B, 2011 , 31(5) : 1786 -1802 . DOI: 10.1016/S0252-9602(11)60361-5

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