Vestnik St. Petersburg University, Mathematics > 2017 > 50 > 2 > 173-179
Source
Abstract
Identifiers
journal ISSN : | 1063-4541 |
journal e-ISSN : | 1934-7855 |
DOI | 10.3103/S106345411702008X |
Vestnik St. Petersburg University, Mathematics > 2017 > 50 > 2 > 173-179
journal ISSN : | 1063-4541 |
journal e-ISSN : | 1934-7855 |
DOI | 10.3103/S106345411702008X |