Indexing and Abstracting
Google Scholar
Mendeley
ScienceOpen
Crossref
DORA (San Francisco Declaration)
Genamics JournalSeek
ResearchGate
Semantic Scholar
ORCID
Korea Open Access (KOAR)
GIGA (German Institute for Global and Area Studies)
Ulrich's Periodicals Directory
ASCI Database
OAJI (Open Academic Journals Index)
ScienceGate
OpenAIRE
BASE (Bielefeld Academic Search Engine)
Index Copernicus
Scilit
Research Bible
WorldCat (OCLC)
Dimensions
CORE
Wikidata
InfoBase Index (SI. No. 364)
RefSeek
CiteFactor
Osmikon
TIB (Leibniz Information Centre)
EuroPub
Internet Archive ScholarUniversity Library PassauKatholischen Universität Eichstätt-IngolstadtAnsbach State Library Technische Hochschule Nürnberg Georg Simon OhmHof University of Applied Sciences (Hochschule Hof)Kempten University of Applied SciencesUniversity Library WürzburgDeutsches MuseumTechnische Hochschule Ingolstadt (THI)Augsburg University, Minnesota, United StatesUniversitätsbibliothek RegensburgUniversity Library of Erlangen-Nuremberg (UB)Bayreuth UniversityThe University of North Carolina at Greensboro, United StatesStaats- und Stadtbibliothek AugsburgLibrary of the Bundeswehr University Munich, NeubibergUniversity of RegensburgLudwig Maximilian University of Munich, BavariaOstbayerische Technische Hochschule (OTH)Staatliche Bibliothek Neuburg an der DonauProvincial Library AmbergWeihenstephan-Triesdorf University, FreisingLandshut University of Applied SciencesUniversity of AugsburgState and City Library AugsburgMunich University of Applied SciencesUniversity of Applied Sciences Würzburg-Schweinfurt, BavariaOsnabrück University of Applied SciencesUniversity of Hohenheim, StuttgartHafenCity Universität HamburgBibliothek-Zentrum Baden-WürttembergKarlsruhe Institute of Technology (KIT)Zentrale Hochschulbibliothek Flensburg (ZHB)DTU Library, DenmarkBavarian State Library – Bayerische Staatsbibliothek, MunichTechnische Universität BraunschweigTUM University LibraryLindell Library, Minnesota, United StatesHTW Berlin – University of Applied Sciences, BerlinLeipzig UniversityBibliothek der HSU / UniBwH – Helmut-Schmidt-UniversitätEuropa-Universität FlensburgMax Planck Institute, BerlinOsnabrück UniversityHarvard Library, Massachusetts, United StatesKiel University Library