A. P. Yushkevich, “N. I. Lobachevskii. Scientific and pedagogic legacy. Guidance of the Kazan' University. Fragments. Letters (a review)”, Uspekhi Mat. Nauk, 1978, Volume 33, Issue 3(201),Pages <nobr>217

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Uspekhi Mat. Nauk, 1978 Volume 33, Issue 3(201), Pages 217–221 (Mi rm3456)

N. I. Lobachevskii. Scientific and pedagogic legacy. Guidance of the Kazan' University. Fragments. Letters (a review)

A. P. Yushkevich