SD Google Authorship
An easy way how to implement Google Authorship on Joomla sites. Plugin SD Google Authorship is simply easy use and quick setup able on Joomla site. It is working for multiple authors on one site.
For support authorship in K2 extension, be sure you are using 3.2 version. In previous version 3.1 wasn't plugin working in all cases. From 3.2 it's fixed.