Fu , ShouzhongQiao , Zhijun and Wang , Zhong. (2021). Eigenvalues and Eigenfunctions of a Schrödinger Operator Associated with a Finite Combination of Dirac-Delta Functions and CH Peakons.
            <i>Journal of Nonlinear Modeling and Analysis</i>. <i>3</i> (1).
            131-144.
         doi:10.12150/jnma.2021.131