Scopus, Chemical Abstracts Service/SciFinder, Scilit, ChemWeb, Google Scholar, EI/Compendex, MediaFinder®-Standard Periodical Directory, METADEX, INSPEC, Genamics JournalSeek, PubsHub, J-Gate, CNKI Scholar, Suweco CZ, TOC Premier, EBSCO, Ulrich's Periodicals Directory, JournalTOCs, QOAM and Dimensions.