[cairo] Cairo tutorials for beginners

[Doodle]

Hi all,

I'm gonna hold a presentation in some weeks, where I will also talk
about Cairo. For this, I'd like to collect some URLs which I could give
to the audience, for those who'd like to try coding with Cairo.

I only know the Samples page on the official Cairo web site:
http://cairographics.org/samples/

Does anybody here know other pages from where people could learn
the Cairo API?

Thanks in advance,
   Doodle