1. More cases of polonium-210 contamination are uncovered in London;Dyer;British Medical Journal,2007
2. http://www.livescience.com/39961-chernobyl.html#sthash.NPIQczPe.dpuf 2016
3. http://nuclearweaponarchive.org/News/PoloniumPoison.html 2016
4. A primer for nuclear terrorism;Leikin;Disease-a-Month,2003a