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Mathematical Events in the USSR
Nikolay Vladimirovich Efimov (on the occasion of his fiftieth birthday)
A. D. Aleksandrov, A. V. Pogorelov
Citation:
A. D. Aleksandrov, A. V. Pogorelov, “Nikolay Vladimirovich Efimov (on the occasion of his fiftieth birthday)”, Russian Math. Surveys, 15:6 (1960)
Linking options:
https://www.mathnet.ru/eng/rm6793 https://www.mathnet.ru/eng/rm/v15/i6/p175
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