In reply to Ciro:
You will retain the rights, but make this explicit if needs be.
It's worth stipulating usage to them, ie whether you're allowing them to use it as a one off only, or in perpetuity, Europe wide/Worldwide etc, in print/web use, or both. Ask for a byline if you want one, they may not credit you otherwise.
It's still your photo at the end of the day unless you say otherwise.
Post edited at 17:52