Guida, K., 		Ibnelazyz, L., 		Hilal, K., & 		Oukessou, M.
(2022).
 Qualitative study of a new class of coupled pantograph differential equations involving the psi-Hilfer fractional derivative with multi-point boundary conditions.
<em>Acta Mathematica Universitatis Comenianae, 91</em>(4), 335-350.
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