... article as: Caballero et al.: On existence and uniqueness of positive solutions to a class of fractional boundary value problems. Boundary Value Problems 2011 2011:25.Caballero et al. Boundary ... Kilbas, AA: Fractional Integral and Derivative, Theory and Applications. Gordon and Breach,Yverdon, Switzerland (1993)9. Miller, KS, Ross, B: An Introduction to the Fractional Calculus and Fractional ... Harjani and K Sadarangani* Correspondence: fefi@dma.ulpgc.esDepartamento de Matemáticas,Universidad de Las Palmas de GranCanaria, Campus de Tafira Baja,35017 Las Palmas de Gran Canaria,SpainAbstractThe...