V. K. Ivanov, “Letter to the Editor”, Mat. Sb. (N.S.), 1953, Volume 33(75), Number 3,Page 676

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Mat. Sb. (N.S.), 1953 Volume 33(75), Number 3, Page 676 (Mi sm5401)

Letter to the Editor

V. K. Ivanov

Received: 25.08.1953