1. Japanese officials on defensive as nuclear alert level rises;Bradsher;New York Times,2011
2. Pregnant women fleeing to Kansai: Tohoku catastrophe, Tokyo radiation fears prompting relocation;Johnston;The Japan Times,2011
3. The medical aspects of radiation incidents,2011
4. Sources and effects of ionizing radiation,2010
5. High background radiation areas of Ramsar, Iran;Mortazavi,2002