1. J. Zeng, Quantum Mechanics [in Chinese], Science Press, Beijing (2000).
2. W. Greiner, Quantum Mechanics: An Introduction, Springer, Berlin (1989).
3. M. A. Shifman, Lie Algebras, Cohomology, and New Applications to Quantum Mechanics (Contemp. Math., Vol. 160, N. Kamran and P. J. Olver, eds.), Amer. Math. Soc., Providence, R. I. (1994).
4. M. A. Shifman, Internat. J. Mod. Phys. A, 4, 2897–2952 (1989).
5. B. A. Turbiner, Commun. Math. Phys., 118, 467–474 (1988).