Pr1090 Pr1090/2006-23 Pr1090/2006-23 / Pr1090/2006-23-02 Gutnik, L. A. On some systems of difference equations : сборник / L. A. Gutnik. - Bonn : [s. n.], 2006. - [20] p. - (Preprint series / Max-Planck-Institut fur Mathematik (Bonn) ; 2006-23). - Bibliogr. at the end of the book. -
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