POSITIVE SOLUTIONS FOR SYSTEMS OF NONLINEAR FOURTH-ORDER SINGULAR DIFFERENTIAL EQUATIONS WITH INTEGRAL BOUNDARY CONDITIONS
XIA Feng, LIU Lishan ,WANG Yongqing
Journal of Systems Science and Mathematical Sciences ›› 2012, Vol. 32 ›› Issue (4) : 459-479.
POSITIVE SOLUTIONS FOR SYSTEMS OF NONLINEAR FOURTH-ORDER SINGULAR DIFFERENTIAL EQUATIONS WITH INTEGRAL BOUNDARY CONDITIONS
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