Existence of positive solutions for fractional differential equations with Riemann-Liouville left-hand and right-hand fractional derivatives. Zhang, Shuqin — 2004 Electronic Journal of Differential Equations (EJDE) [electronic only]
Positive solutions for boundary-value problems of nonlinear fractional differential equations. Zhang, Shuqin — 2006 Electronic Journal of Differential Equations (EJDE) [electronic only]
Upper and lower solutions method and a fractional differential equation boundary value problem. Shi, Ailing; Zhang, Shuqin — 2009 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Solutions to boundary-value problems for nonlinear differential equations of fractional order. Su, Xinwei; Zhang, Shuqin — 2009 Electronic Journal of Differential Equations (EJDE) [electronic only]