1. Braid group action and quantum affine algebras;Beck;Comm. Math. Phys.,1994
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4. N. Bourbaki, Groupes et Algèbres de Lie, Hermann, Paris, 1968 (Chapitres 4–6).
5. V. Chari, A. Pressley, A Guide to Quantum Groups, 2nd ed., Cambridge University Press, Cambridge, 1996.