1. A. B. Shabat and R. I. Yamilov,Algebra Analiz,2, No. 2, 183 (1990).
2. A. N. Leznov, A. B. Shabat, and R. I. Yamilov,Phys. Lett. A,174, 397 (1993).
3. D. Levi,J. Phys. A: Math. Gen.,14, 1083 (1981).
4. R. I. Yamilov,Usp. Mat. Nauk,38, No. 6, 155 (1983).
5. R. I. Yamilov, “Classification of Toda-type scalar lattices,” in:Nonlinear Evolution Equations and Dynamical Systems, World Scientific, Singapore (1993), pp. 423.