“In memoriam of O.A. Ivanov (1951-2019)”, Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2020, Volume 7, Issue 2,Pages <nobr>362

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Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2020 Volume 7, Issue 2, Pages 362–364 (Mi vspua197)

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In memoriam of O.A. Ivanov (1951-2019)