Content Provider
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Cologne University: KUPS
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Eberhard Karls University Tübingen: Publication System
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University of Szeged: SZTE Repository of Papers and Books
33
Wiley Online Library (via Crossref)
32
Graz University (UGR): Unipub
31
MACAU: Open Access Repository of Kiel University
31
Freie Universität Berlin: Refubium (FU Berlin)
30
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
30
Ike Skelton Combined Arms Research Library (CARL) Digital Library
27
ETH Zürich Research Collection
26
Justus-Liebig-Universität Giessen: JLUpub
26
Dresden University of Technology: Qucosa
25
JKI Open Journal Systems (Julius Kühn-Institut)
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Share it - Open Access und Forschungsdaten-Repositorium der Hochschulbibliotheken in Sachsen-Anhalt
24
OPUS - Publication Server of the University of Stuttgart
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Georg-August-Universität Göttingen: eDiss
22
Organic Eprints (Danish Research Centre for Organic Farming, DARCOF)
22
REPOSIT HAW Hamburg
22
TU Braunschweig: LeoPARD - Publications And Research Data
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e-manuscripta.ch
22
PUB - Publications at Bielefeld University
21
ZFDM Repository (Center for Sustainable Research Data Management, Hamburg University)
21
Szent István University (SZIE)
20
University of Innsbruck: Digital Library (Universitäts- und Landesbibliothek Tirol)
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epub.oeaw (The digital publication portal of the Austrian Academy of Sciences)
19
DIAL@USL-B (Université Saint-Louis, Bruxelles)
18
Estonian Academy Publishers
18
Informa (via Crossref)
18
Publikationsdatenbank der Fraunhofer-Gesellschaft
18
Robert Koch Institute: Publications
18
Gutenberg Open Science (Open-Science-Repository of the Johannes Gutenberg-University Mainz)
17
TU Wien: reposiTUm
17
Berufsverband Information Bibliothek (BIB): OPUS
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Heidelberg University: HeiDok
16
Universität Leipzig: Qucosa
16
AMAD - "Archivum Medii Aevi Digitale - Specialized open access repository for research in the middle ages"
15
Harvard University: Harvard Collections
15
University of Copenhagen: Research
15
Augsburg University Publication Server (OPUS)
14
Center for Jewish History: Digital Collections
14
VIURRSpace (Royal Roads University and Vancouver Island University)
14
Contributions to Entomology = Beiträge zur Entomologie (E-Journal)
13
Directory of Open Access Books (DOAB)
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MOnAMi - Publication Server of the University of Applied Sciences Mittweida
13
RegionaliaOpen – Open-Access-Publikationsserver für den Südwesten
13
UNESDOC - UNESCO Digital Library
13
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
12
BOKU:ePUB (Publikationsserver der Universitätsbibliothek Bodenkultur Wien)
12
DBGPrints-Archive (German Soil Science Society)
12
Institutional Repository of Leibniz Universität Hannover
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