ieee referencing rules

For website with no author:

http://www.citethisforme.com/guides/ieee/how-to-cite-a-website

http://libguides.murdoch.edu.au/IEEE/sample

Et al meaning:

which is why most journals recommend the use of et al., which is Latin for et alii or et aliae and means “and others.”
Source:
http://www.editage.com/insights/using-et-al-for-in-text-citations-in-research-papers
More elaborate about et. al and how to use:
http://grammarist.com/usage/et-al/

It contains some others about et. al
http://blog.apastyle.org/apastyle/2011/11/the-proper-use-of-et-al-in-apa-style.html