Abstracting and Indexing

Google Scholar

Semantic Scholar 

Dimensions  

Research BIB  

Research Gate 

PKP Index

Crossref 

ASOS Index 

Scielit

Base 

WorldCat 

ScienceGate

Microsoft Academic Search 

Tilburg University 

University of Skövde

Universiteit Leiden

ie LIBRARY

Univesity of Wales

EuroPub

OUCI 

Copernicus