1
Published: c2003.
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2
Published: c2001-c2004.
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3
Published: c2001.
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4
Published: [2017]
Superior document: Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2017
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5
Published: [2016]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - 1990 - 1999
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