A. F. Lapko, L. A. Lyusternik, “To the Editor of UMN”, Uspekhi Mat. Nauk, 1958, Volume 13, Issue 1(79),Page 239

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Uspekhi Mat. Nauk, 1958 Volume 13, Issue 1(79), Page 239 (Mi rm7412)

Letters to the Editor

To the Editor of UMN

A. F. Lapko, L. A. Lyusternik