ZHOU, Bibo and ZHANG, Lingling. $\alpha$-$(h,e)$-convex operators and applications for Riemann-Liouville fractional differential equations. Topological Methods in Nonlinear Analysis. Online. 26 February 2023. Vol. 61, no. 2, pp. 577 - 590. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2022.014.