1. Continuous Time Markov Chains—An Application Oriented Approach;Anderson,1991
2. Recurrence relations, continued fractions and orthogonal polynomials;Askey;Memoirs of the Amer. Math. Soc.,1984
3. On discrete and numerical inverse Sturm-Liouville problems;Hald;Uppsala Univ. Dept. of Computer Sci., Rep. No. 42,1972
4. On some inverse problems in matrix theory;Hochstadt;Arch. Math.,1967