Science China Mathematics > 2011 > 54 > 3 > 463-468
Source
Abstract
Identifiers
journal ISSN : | 1674-7283 |
journal e-ISSN : | 1869-1862 |
DOI | 10.1007/s11425-011-4184-y |
Science China Mathematics > 2011 > 54 > 3 > 463-468
journal ISSN : | 1674-7283 |
journal e-ISSN : | 1869-1862 |
DOI | 10.1007/s11425-011-4184-y |