Bulletin of the Polish Academy of Sciences. Mathematics > 2010 > 58 > 2 > 117-127
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Abstract
Identifiers
journal ISSN : | 0239-7269 |
DOI | 10.4064/ba58-2-3 |
Bulletin of the Polish Academy of Sciences. Mathematics > 2010 > 58 > 2 > 117-127
journal ISSN : | 0239-7269 |
DOI | 10.4064/ba58-2-3 |