Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
20
USP Production Repository (Universidade de São Paulo)
10
University of Michigan: Digital Collections
10
University of Lethbridge Digitized Collections
9
Unknown
8
Directory of Open Access Journals: DOAJ Articles
7
Universidade Federal do Paraná (UFPR): Teses & Dissertações
5
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
5
University of São Paulo: Digital Library of Theses and Dissertations
5
Springer Nature (via Crossref)
4
Portal de Periódicos - UFPE (Universidade Federal de Pernambuco)
3
North Dakota State University (NDSU): Digital Horizons
2
Persée: Portail de revues scientifiques en sciences humaines et sociales
2
University of Freiburg: FreiDok
2
Biblioteca Digital de Periódicos da UFPR
1
Biblioteca Digital de Periódicos da UFPR (Universidade Federal do Paraná)
1
Cambridge University Press
1
Dialnet - Portada de revistas (Universidad de La Rioja)
1
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
1
Ghent University Academic Bibliography
1
Informa (via Crossref)
1
Natural Environment Research Council: NERC Open Research Archive
1
Open Research Library
1
Pantheon Repositório Institucional da UFRJ (Universidade Federal do Rio de Janeiro)
1
Portal de Periódicos da UFRJ (Universidade Federal do Rio de Janeiro)
1
Portal de Revistas Académicas de la Universidad de Chile
1
RI FURG (Repositório da Universidade Federal do Rio Grande)
1
Saint Mary's University, Halifax: Institutional Repository
1
SciELO Brazil (Scientific Electronic Library Online)
1
Universidad de Chile: Repositorio académico
1
Universidade Federal de São Paulo (UNIFESP): Repositório Institucional
1
Universidade de São Paulo: Portal de Revistas da USP
1
University of British Columbia: cIRcle - UBC's Information Repository
1
University of Tasmania: UTas ePrints
1
Université du Québec en Abitibi-Témiscamingue (UQAT): Depositum
1
York University, Toronto: YorkSpace
1
the Digital Archaeological Record (via DataONE)
1
uO Research (University of Ottawa - uOttawa)
1
Érudit.org (Université Montréal)
1