Indexed / Abstracted

EBSCO host
DOAJ (Directory of Open Access Journals)
ERIH PLUS - The European Reference Index for the Humanities and the Social Sciences (2020-10-29)
ARIANTA - Polish Scientific and Professional Electronic Journals
- Ulrichsweb™ - Ulrich's Global Serials Directory
EuroPub - Open Access Comprehensive, Multipurpose Database Covering Scholarly Literature
- Information Matrix for the Analysis of Journals (MIAR)
Index Copernicus (ICV 2020: 91.17)
- JournalTOCs - The biggest searchable collection of scholarly journal Tables of Contents (TOCs)
- OAJI - Open Academic Journals Index is a full-text database of open-access scientific journals
- GIFT - Global Information Full Text, Switzerland
Google Scholar
Academia
Cross Ref
Biblioteka Narodowa (Warsaw)
RePEc
ISSN National Centre
ResearchBib
World Cat
Scilit
UNPAYWALL
Socionet
BASE
Dimensions
OpenAIRE
LENS
Microsoft Academic (finding articles by DOI)
CORE
Korea Open Access platform for Researchers
Open Ukrainian Citation Index
Open Archives
Semantic Scholar (finding articles by Article Title)
Fatcat
Neliti
ScienceGate Academic Search Engine
Karlsruhe Virtual Catalog (Germany)
Bibliotheks Verbund Bayern (Germany)
Regensburger Katalog (Germany)
University Library of Regensburg
Leibniz Information Centre for Science and Technology and University Library
Universitätsbibliothek Leipzig
EconBIZ
EconPapers
The Union Catalogue of Serials (ZDB)
WILBERT (Wildaüer Bucher +Medien Recherche-Tool)
PHSG University of Education St.Gallen
Sherpa Romeo
Public Knowledge Project
University of Saskatchewan Library (Canada)
University of Washington Libraries (USA)
Research4Life
University of South Australia Library
Falvey Memorial Library, Villanova University (USA)
iDiscover (University of Cambridge)
QOAM (Quality Open Access Market)
LIVIVO - interdisciplinary search engine for literature and information in the field of life sciences. It is run by ZB MED – Information Centre for Life Sciences
BU Libraries - Boston University Libraries (USA)
Stanford University Libraries (USA)
University of Ottawa Library (Canada)
York University Libraries (Canada)
LEUPHANA Uni­ver­sität Lüne­burg (Germany)
DiscoverEd - The University of Edinburgh (Great Britain)
Library Hub Discover - combined catalogs of the major UK and Irish libraries
The University of Sheffield (Great Britain)
Monterey Bay Library - California State University (USA)
The University of Chicago Library (USA)
- University of Toronto Libraries (Canada)

Digital archiving:
PKP Preservation Network (PKP PN)