Why am I getting referrals from the IAEA?

I just happened to look at my statistics (my host uses the MatrixStats system) and noticed that a staggering 48% of my referred sessions were referred by the International Atomic Energy Agency. Like, why on earth would they refer anyone to my blog? The hits allegedly come straight off http://www.iaea.org/ rather than from any sub-page, yet when I checked their homepage, I could not find any obvious reference to my blog either in the page itself or the source code.

(It’s not the first time I’ve been getting unexplained referrals. A few weeks ago I was getting hits referred from a company called PHP Soft, which I’ve never been in any contact with other than to visit their website to see why people were coming to my site from theirs.) Maybe this is just a fault with Matrix.

Has anyone else been getting strange referrals?