182 citations to https://www.mathnet.ru/rus/intd31
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F W Nijhoff, V G Papageorgiou, H W Capel, G R W Quispel, “The lattice Gel'fand-Dikii hierarchy”, Inverse Problems, 8:4 (1992), 597
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B.A. Kupershmidt, “Infinite-dimensional analogs of the minimal coupling principle and of the Poincaré lemma for differential two-forms”, Differential Geometry and its Applications, 2:3 (1992), 275
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А. О. Радул, “Алгебры Ли дифференциальных операторов, их центральные расширения и $W$-алгебры”, Функц. анализ и его прил., 25:1 (1991), 33–49 ; A. O. Radul, “Lie algebras of differential operators, their central extensions, and $W$-algebras”, Funct. Anal. Appl., 25:1 (1991), 25–39
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Zhong-Hua Wang, “Physics counterpart of quasiconformal transformation, two-dimensional quantum gravity and their symmetries”, Physics Letters B, 264:1-2 (1991), 39
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A.O. Radul, “Non-trivial central extensions of Lie algebras of differential operators in two and higher dimensions”, Physics Letters B, 265:1-2 (1991), 86
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B. A. Kupershmidt, “Quantizations and integrable systems”, Lett Math Phys, 20:1 (1990), 19
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I. Bakas, NATO ASI Series, 245, Differential Geometric Methods in Theoretical Physics, 1990, 203
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M. Hazewinkel, Encyclopaedia of Mathematics, 1990, 361
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Dirk-Jan Smit, “A quantum group structure in integrable conformal field theories”, Commun.Math. Phys., 128:1 (1990), 1
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B A Kupershmidt, “The quasiclassical limit of the modified KP hierarchy”, J. Phys. A: Math. Gen., 23:6 (1990), 871