1. A. Belavin and V. Drinfeld, “Triangle equations and simple Lie algebras,” Soviet Sci. Rev. Sect. C. Math. Phys. Rev., 4, 93–165 (1984).
2. V. Coll, M. Gerstenhaber, and A. Giaquinto, “An explicit deformation formula with noncommuting derivations,” Israel Math. Conf. Proceedings, 1, 396–403 (1989).
3. V. Drinfeld, “Hopf algebras and the quantum Yang–Baxter equation,” Dokl. Akad. Nauk SSSR, 283, 1060–1064 (1985).
4. V. Drinfeld, “Constant quasiclassical solitons of the Yang–Baxter quantum equation,” Soviet Math. Doklady, 28, 667–671 (1983).
5. P. Etingof and D. Kazhdan, “Quantization of Lie bialgebras. I,” Sel. Math. (NS), 2, 1–41 (1996).