ScienceDirect : (Elsevier) 1998-Present

SCOPUS

MathSciNet

Emerald : 1994- Present

EBSCO

JSTOR : Economics and Finance

ProQuest

Oxford : 2000 – Present

Springer

IOP

Nature

ASCE : 1995—Present

IEEE Xplore

ISI Web of Knowledge

ACS : All Archives

ASME : 2000 – Present

AIP : all Archives

APS : all Archives

Scitation: AIP/APS, ASCE, ASME

Wiley (Blackwell) : 1996—Present