V. B. Lidskii, “Some problems of the spectral theory of systems of differential equations”, Uspekhi Mat. Nauk, 1957, Volume 12, Issue 1(73),Page 218

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Uspekhi Mat. Nauk, 1957 Volume 12, Issue 1(73), Page 218 (Mi rm7554)

Scientific communications

Some problems of the spectral theory of systems of differential equations

V. B. Lidskii