Table 6 Selected electronic databases

ACM Digital Library

http://dl.acm.org/

CiteSeerX

http://citeseerx.ist.psu.edu/index

CORDIS

http://cordis.europa.eu/projects/home_en.html

Google Scholar

https://scholar.google.co.uk/

IEEE Xplore Digital Library

http://ieeexplore.ieee.org/Xplore/home.jsp

ScienceDirect Library

http://www.sciencedirect.com/

Scopus

http://www.scopus.com/

SpringerLink

http://link.springer.com/