1. M. Kac and P. Van Moerbeke, “On some periodic Toda lattices,” Proc. Nat. Acad. Sci. USA (2nd ed.), 72, 1627–1629 (1975).
2. A. I. Aptekarev, “Asymptotic properties of polynomials orthogonal on a system of contours, and periodic motions of Toda chains,” Mat. Sb., 125(167), 231–258 (1984).
3. W. Van Assche, “Christoffel functions and Tura’n determinants on several intervals,” J. Comput. Appl. Math., 48, 207–223 (1993).
4. D. Barrios, G. Lopes, and E. Torrano, “Polynomials generated by a three-term recurrence relation with asymptotically periodic complex coefficients,” Mat. Sb., 186, 3–34 (1995).
5. J. Bazargan and I. Egorova, “Jacobi operator with step-like asymptotically periodic coefficients,” Mat. Fiz. Anal. Geom., 10:3, 425–442 (2003).