“…Of course, when pðxÞ ≡ pðorp = 2Þ and sð•Þ ≡ s, the operators in (1) reduce to the classical non-local fractional p -Laplacian, i.e., ð−ΔÞ s p (ð−ΔÞ s ). Similarly, for the Kirchhofftype system cases, the papers [14][15][16][17][18][19][20] introduce a lot of related work in recent years, where many authors studied the existence and multiplicity of solutions by applying variational methods. For instance, based on the three critical points theorem, Azroul et al ( [15]) discussed an elliptic system with the homogeneous Dirichlet boundary conditions, and they obtained the existence of three weak solutions.…”