Vestnik St. Petersburg University: Mathematics > 2008 > 41 > 1 > 60-64
Source
Abstract
Identifiers
journal ISSN : | 1063-4541 |
journal e-ISSN : | 1934-7855 |
DOI | 10.3103/S106345410801010X |
Vestnik St. Petersburg University: Mathematics > 2008 > 41 > 1 > 60-64
journal ISSN : | 1063-4541 |
journal e-ISSN : | 1934-7855 |
DOI | 10.3103/S106345410801010X |