Guida, K., 		Ibnelazyz, L., 		Hilal, K., & 		Oukessou, M.
2022 Nov 26.  Qualitative study of a new class of coupled pantograph differential equations involving the psi-Hilfer fractional derivative with multi-point boundary conditions. Acta Mathematica Universitatis Comenianae. [Online] 91:4