Databases
- Academic Search Premier(EBSCO)
- ArXiv.org(Cornell University)
- Directory of Open Access Journals(DOAJ)
- Open Science Directory
- Scitation (AIP)
- Science(1997 - present)
- Science Archive(1880 - 2007) (JSTOR)
- ScienceDirect(Elsevier)
- SpringerLink
- Wiley Online Library