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Yuriĭ Leonidovich Ershov (on the occasion of his fiftieth birthday)
Citation:
“Yuriĭ Leonidovich Ershov (on the occasion of his fiftieth birthday)”, Algebra Logika, 29:2 (1990), 135–138
Linking options:
https://www.mathnet.ru/eng/al2609 https://www.mathnet.ru/eng/al/v29/i2/p135
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