Aleksei Ivashchenko [ru] (Russian: Алексей Игоревич Иващенко, born 12 May 1958 in Moscow) and Georgy Vasilyev [ru] (Russian: Георгий Леонардович Васильев, born 22 June 1957 in Zaporizhia, Ukraine) are a Soviet/Russian bard duo, informally known as Ivasi (a pun on the "iwashi herring").
They have also written and staged the musical Nord-Ost.
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