Université de la Terre (UNESCO) à Paris, le 2 avril 2011.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/21717345@N03">Jérôme Choain</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external autonumber" href="https://www.flickr.com/photos/21717345@N03/5582897928">[1]</a>