By Fan A.-H.   Schmeling J.   in Journal of Algebra

ISSN:0021-8693|272|2|470-475

Elsevier‎(2004)‎

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By Fan A.H.   Ball K-S.J.A.   in Journal of Mathematical Analysis and Applications

ISSN:0022-247X|231|2|319-344

Academic Press‎(1999)‎

Access to resources Favorite 1.6115309