Cambridge Structural Database (Cambridge Crystallographic Data Centre)
Chemical Abstracts Service/SciFinder (ACS)
ChemWeb (ChemIndustry.com)
Chimica Database (Elsevier)
Current Contents: Physical, Chemical & Earth Sciences (Thomson Reuters)
INSPEC (IET)
Journal Citation Reports/Science Edition (Thomson Reuters)
Nature Index (Springer Nature)
PASCAL Database (INIST/CNRS)
Science Citation Index (Thomson Reuters)
Science Citation Index Expanded (Thomson Reuters)
SCOPUS (Elsevier)
VINITI (All-Russian Institute of Science & Technological Information)
Web of Science (Thomson Reuters)