HTML5 logo in essay

Hello w3c Team,
i want to write an instruction essay to HTML 5 and  just
want to know if i can use the HTML5 logo on my site.
Of course i will link back to the w3c site in this essay.
Please let me know if that is ok...

Thanks a lot and best regards,
Kian
http://rosio.de
http://zippie.de