JONNALAGADDA, Jagan Mohan. Existence theory for nabla fractional three-point boundary value problems via continuation methods for contractive maps. Topological Methods in Nonlinear Analysis. Online. 16 July 2023. Vol. 61, no. 2, pp. 869 - 888. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2022.043.