1. On co-recursive orthogonal polynomials;Chihara,1957
2. An Introduction to Orthogonal Polynomials;Chihara,1978
3. Orthogonal Polynomials;Szegö,1939
4. Páde-Type Approximation and General Orthogonal Polynomials;Brezinsky,1980
5. The L2 method for a soluble model;Stelbovics;Phys. Rev. A,1986