- Academia
- BASE
- CORE
- CrossRef
- Dimensions
- Dissemin (finding articles by Article Title)
- Fatcat
- Google Scholar (h-index - 12)
- iDiscover (University of Cambridge)
- Index Copernicus (ICV 2019: 91.15)
- International Impact Factor Services
- ISSN National Centre
- Korea Open Access platform for Researchers
- LENS
- Neliti
- OpenAIRE
- Open Archives
- Open Ukrainian Citation Index
- Public Knowledge Project
- Publons
- ResearchBib
- Research4Life
- ScienceGate Academic Search Engine
- Scientific Indexing Services
- Semantic Scholar (finding articles by Article Title)
- Scilit
- Sherpa Romeo
- Socionet
- UNPAYWALL
- Ulrichsweb™ - Ulrich's Global Serials Directory

Libraries:
- Biblioteka Narodowa (Warsaw)
- Bibliotheks Verbund Bayern (Germany)
- Harvard Library
- PHSG University of Education St.Gallen
- University of Saskatchewan Library (Canada)
- University of Washington Libraries (USA)
- University of South Australia Library
- World Cat

Digital archiving:
- PKP Preservation Network (PKP PN)