Liu , Yani and Li , Qiaoluan. (2022). Existence and Uniqueness of Solutions and Lyapunov-Type Inequality for a Mixed Fractional Boundary Value Problem.
            <i>Journal of Nonlinear Modeling and Analysis</i>. <i>4</i> (2).
            207-219.
         doi:10.12150/jnma.2022.207