1
Published: [2019]
2
Published: [1997]
Superior document: Contemporary mathematics, 203
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3
Published: [1996]
Superior document: Title is part of eBook package: De Gruyter EDP Sciences Archive eBook Package 1970-1999
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4
Published: [2020]
Superior document: Title is part of eBook package: De Gruyter DGBA Physical Sciences <1990
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