|
Brief Communications
Letter to the Editor
S. A. Pichugov Dnepropetrovsk National University of Railway Transport
Received: 14.02.2018
Citation:
S. A. Pichugov, “Letter to the Editor”, Mat. Zametki, 104:6 (2018), 953; Math. Notes, 104:6 (2018), 944
Linking options:
https://www.mathnet.ru/eng/mzm12172https://doi.org/10.4213/mzm12172 https://www.mathnet.ru/eng/mzm/v104/i6/p953
|
|