1. Chervov, A., Talalaev, D.: The KZ equation, G-opers, the quantum Drinfeld–Sokolov reduction and the quantum Cayley–Hamilton identity. J. Math. Sci. (N.Y.) 158, 904–911 (2008)
2. Drinfeld, V., Sokolov, V.: Lie algebras and equations of Korteweg-de Vries type (Russian) Current problems in math, vol. 24. Moscow, pp. 81–180 (1984)
3. Feigin, B., Frenkel, E.: Quantization of the Drinfeld–Sokolov reduction. Phys. Lett. B 246, 75–81 (1990)
4. Frenkel, E., Reshetikhin, N., Semenov-Tian-Shansky, M.: Drinfeld–Sokolov reduction for difference operators and deformations of W-algebras. I. The case of Virasoro algebra. Commun. Math. Phys. 192, 605–629 (1998)
5. Frenkel, E., Reshetikhin, N.: Quantum affine algebras and deformations of the Virasoro and W-algebras. CMP 178, 237–264 (1996)