1. P. P. Kulish and N. Yu. Reshetikhin, Zapiski Semenarov LOMI 101:101 (1981) (in Russian).
2. E. K. Sklyanin, Funkts. Anal. Prilozh. 16:27 (1982) (in Russian).
3. V. G. Drinfeld, Quantum groups, in: “Proceedings of the International Congress of Mathematicians”, A. M. Gleason, ed., American Mathematical Society, Providence, RI (1986).
4. L. C. Biedenharn, The quantum group SUq(2) and a q-analogue of the boson operators, J. Phys. A 22:L873 (1989).
5. A. J. Macfarlane, On q-analogues of the quantum harmonic oscillator and the quantum group SUq(2), J. Phys. A 22:4581 (1989).