MathSciNet bibliographic data MR1068698 17B81 (17B35 17B67 17B68 81R10 81T40) Pope, C. N.; Romans, L. J.; Shen, X. Ideals of Kac-Moody algebras and realisations of $W_\infty$$W_\infty$. Phys. Lett. B 245 (1990), no. 1, 72–78. Article

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