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Mathematical Events in the USSR
Ivan Georgievich Petrovskii (for his fiftieth birthday)
A. N. Kolmogorov
Citation:
A. N. Kolmogorov, “Ivan Georgievich Petrovskii (for his fiftieth birthday)”, Russian Math. Surveys, 6:3 (1951)
Linking options:
https://www.mathnet.ru/eng/rm6860 https://www.mathnet.ru/eng/rm/v6/i3/p160
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