Indexed

• Cabells
• Dialnet
• Digital Bibliography & Library Project (DBLP)
• Directory of Open Access Journals (DOAJ)
• EBSCO - Applied Science & Technology Source
• Gale
• Google Scholar
• Institution of Engineering and Technology (IET): Inspect
• Index Copernicus International (ICI): Journals Master List 
• Index Copernicus International (ICI): World of Journals
• Latindex
• Matriz de Información para el Análisis de Revistas (MIAR)
• Publindex
• Red de Bibliotecas Universitarias (REBIUN)
• Red Iberoamericana de Innovación y Conocimiento Científico (REDIB)
• ResearchGate
• Science Citation Index Expanded (SCIE) (Clarivate Analytics)
• Scopus
• The Register for Scientific Journals, Series and Publishers - Levels 1, 2 (Norwegian Directorate for Higher Education and Skills)
• WorldCat
• zenodo

Other indexes / Databases:

Cleveland State University (USA), Dulcinea, Georgetown University (USA), National Library of Australia, Queensland University of Technology (Australia), Standford University (USA), The University of Hong Kong, Ulrichs Web. Global Serials Directory, University of Ottawa (Canada), University of Tsukuba (Japan), University of York (Canada).