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WBG eBooks
WBG
Datenbank-Infosystem (DBIS)
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InCites
Datenbank-Infosystem (DBIS)
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Scopus
Elsevier
Datenbank-Infosystem (DBIS)
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utb elibrary
Datenbank-Infosystem (DBIS)
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Web of Science Core Collection
Datenbank-Infosystem (DBIS)