PORTICO

Google Scholar

Semantic Scholar

Scilit-MDPI

J-Gate

Publons

Academia.edu

International Innovative Journal Impact Factor [IIJIF]

Research Bible

Zenodo

Academic Keys

Polska Bibliografia Naukowa [PBN]-Poland

Geneva Foundation for Medical Education and Research (WHO)

OpenAire-Australia

Directory of Research Journal Indexing (DRJI)

World Catalogue of Scientific Journals-Poland

SAIF/SAJI-The Netherlands

Root Indexing Services

Journals Directory

Genamics -JournalSeek

Directory of Journals Indexing