Mishev, J. “ON INVERSE PROBLEM IN QUANTUM SCATTERING THEORY FOR RADIAL SCHRODINGER EQUATION II. NONINTEGRAL ORBITAL MOMENTUM”. Ann. Sofia Univ. Fac. Math. And Inf., vol. 82, no. 2, Dec. 1991, pp. 143-61, https://annual.uni-sofia.bg/index.php/fmi/article/view/541.