[O] How to include an extra css when export html

[loochao maillist]

Dear list,

I'm trying to include my own css when using org-html-export-as-html.

I tried to have 

# Local Variables:

# org-export-html-style-extra: "<link rel=\"stylesheet\" type=\"text/css\" href="" />"

# End:

and

#+HTML_INCLUDE_STYLE: my-css-path

But none of above work, is there any suggestion?

Thanks,

Chao