Zhiying DENG , Yisheng HUANG . MULTIPLE SYMMETRIC RESULTS FOR A CLASS OF BIHARMONIC ELLIPTIC SYSTEMS WITH CRITICAL HOMOGENEOUS NONLINEARITY IN R^N[J]. Acta mathematica scientia, Series B, 2017 , 37(6) : 1665 -1684 . DOI: 10.1016/S0252-9602(17)30099-1

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