Soviet-French scientific collaboration
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Tallinn, May 14-18, 1985
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Topic IV of Subject VII of "Informatics" problem
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on mathematical problems; Irkutsk, June 22-25, 1982
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France, October 2-8, 1978. Ershov was the head of Soviet delegation
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Novosibirsk, May, 10-15, 1976.
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on operating systems; Novosibirsk, September 11-20, 1972
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