Mathematics in problems. Materials of schools for Moscow team to Russian Mathematical Olympiad}. Ed. by D. Permyakov, A. Shapovalov, A. Skopenkov, M. Skopenkov and A. Zaslavskiy. Moscow Center for Continuous Mathematical Education, 2009, 488 p. (in Russian).
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| Авторы: Skopenkov M., Skopenkov A., Shapovalov A., Permiakov D., Zaslavsky A. |