Baidu
CNPIEC
Chemical Abstracts Service (CAS)
Dimensions
EBSCO
EMBASE
Gale
Google Scholar
Japanese Science and Technology Agency (JST)
Naver
Norwegian Register for Scientific Journals and Series
OCLC WorldCat Discovery Service
Portico
ProQuest
Reaxys
SCImago
Scopus
Science Citation Index Expanded (SCIE)
Semantic Scholar
Wanfang