“…Meanwhile, coupled fractional differential systems have been studied in some recent works [8,13,14]. For example, in [8], the authors studied the following coupled system of fractional differential equations with nonlocal integral boundary conditions where D α 0 + is the standard Riemann-Liouville fractional derivative, 1 < α, β 2, 0 < η 1 , η 2 < 1,…”