Qi, Tingting; Zhang, Zhenfu; Liu, Yansheng Existence of positive solutions for fractional differential system with coupled integral boundary conditions. (Chinese. English summary) Zbl 1438.34051 J. Shandong Univ., Nat. Sci. 54, No. 2, 71-78 (2019). MSC: 34A08 34B18 34B10 47N20 PDFBibTeX XMLCite \textit{T. Qi} et al., J. Shandong Univ., Nat. Sci. 54, No. 2, 71--78 (2019; Zbl 1438.34051) Full Text: DOI
Wu, Chengming Existence of positive periodic solutions for second order singular coupled systems. (Chinese. English summary) Zbl 1349.34133 J. Shandong Univ., Nat. Sci. 50, No. 10, 81-88 (2015). MSC: 34C25 34B18 34B16 47N20 37C60 PDFBibTeX XMLCite \textit{C. Wu}, J. Shandong Univ., Nat. Sci. 50, No. 10, 81--88 (2015; Zbl 1349.34133) Full Text: DOI