1. Journal impact factor.
http://wokinfo.com/essays/impact-factor/
(2014). Accessed: 2014-02-01.
2. Thomson reuters.
http://thomsonreuters.com/
(2014). Accessed: 2014-02-01.
3. Web of knowledge.
http://wokinfo.com/
(2014). Accessed: 2014-02-01.
4. Personal impact factor.
http://libguides.mssm.edu/individualimpactfactor
(2014). Accessed: 2014-02-01.
5. Individual impact factor.
http://guides.library.jhu.edu/content.php?pid=23548&sid=2871153
(2014). Accessed: 2014-02-01.