Chemical Abstracts Service,  CAS Source Index (CASSI), ROAD, Google Scholar, Journal TOCS, Journal Factor CrossRef, Index Copernicus International, BASE, Journal Informatics,  Semantic Scholar, DRJI. Research Bib, PKP, Citefactor, Root Indexing, Scientific Indexing Services (SIS), Cosmos , Elektronische Zeitschriftenbibliothek, International Institute of Organized Research (I2OR), Scribd, Worldcat,  International Innovative Journal Impact Factor, Open J-Gate, citeSeer^x, Elektronische Zeitschriftenbibliothek, International Scientific Indexing, arXiv, Publons, QOAM,  Katalog fur die Bibiliotheken der Universitat Heidelberg (HEIDI), Journal Factor, OPACplus, Bayerische Staatsbibliothek, OPAC (Online Public Acess catalog),  Eurasian Scientific Journal Index(ESJI), SHERPA/ROMEO, etc.