Shikun Bai

Nontrivial solutions for an integral boundary value problem involving Riemann–Liouville fractional derivatives

D. O’Regan, Jiafa Xu, Zhengqing Fu, 2019, Journal of Inequalities and Applications.

Solvability for a system of Hadamard fractional multi-point boundary value problems

Lishan Liu, Jiafa Xu, Yonghong Wu, 2021 .

Nontrivial solutions for an integral boundary value problem involving Riemann–Liouville fractional derivatives

D. O’Regan, Jiafa Xu, Zhengqing Fu, 2019, Journal of Inequalities and Applications.