Science Citation Index Expanded™ (SciSearch®), Journal Citation Reports/Science Edition, InCites, Chemistry Citation Index®, Current Contents®/Physical, Chemical & Earth Sciences, ISI Alerting Service, BIOSIS Previews, BIOSIS Reviews Reports and Meetings, MEDLINE/PubMed, Scopus, Chemical Abstracts Service/SciFinder, Cambridge Scientific Abstracts (CSA)/ProQuest, Scilit, ChemWeb, Google Scholar, MediaFinder®-Standard Periodical Directory, Genamics JournalSeek, Cabell's Directory, PubsHub, Index Copernicus, J-Gate, CNKI Scholar, Suweco CZ, TOC Premier, EBSCO, British Library, Ulrich's Periodicals Directory, JournalTOCs, QOAM and Dimensions.