“…Similar to classical fractional derivatives, there are two main types of generalized proportional fractional derivatives: Caputo-type and Riemann-Liouville-type. Several results concerning the existence (see, for example, [13,14]), integral presentation of the solutions (see, for example, [15]), stability properties (see, for example, [16,17]) and applications to some models (see, for example, [16]) are considered with the Caputo type of generalized proportional fractional derivatives. Additionally, there are some results concerning the Riemann-Liouville type.…”