“…The main advantage of the operator is that it has a nonlocal and nonsingular kernel. More recently, new advances and studies in fractional differential equations has been published from a mathematical modeling point of view, see recent papers [52] , [19] , [27] , [30] , [46] , [15] , [8] , [28] , [44] , [29] , [7] , [4] , [12] , [11] .…”