By Aizpuru Antonio   Gutiérrez–Dávila Antonio   in Acta Mathematica Sinica

ISSN:1439-8516|20|5|949-960

Springer Publishing Company ‎(2004)‎

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By Aizpuru Antonio   Gutiérrez-Dávila Antonio   in Quaestiones Mathematicae

ISSN:1727-933X|30|3|381-389

Taylor & Francis Ltd‎(2007)‎

Access to resources Favorite 11.564547