Symmetries and Recursion Operators for Classical and Supersymmetric Differential Equations by I.S. Krasil'shchik, P.H. Kersten.
To our wives, Masha and Marian Interest in the so-called completely integrable systems with infinite num ber of degrees of freedom was aroused immediately after publication of the famous series of papers by Gardner, Greene, Kruskal, Miura, and Zabusky [75, 77, 96, 18, 66, 19J (see also [76]) on str...
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