http://www.oddee.com/item_98772.aspx
http://brainz.org/10-most-notorious-suicide-cults-history/
http://listverse.com/2013/09/03/10-war-time-mass-suicides/
http://www.weirdlyodd.com/the-most-terrifying-mass-suicides-in-the-history-of-mankind/
http://www.examiner.com/list/don-t-drink-the-kool-aid-top-5-mass-suicide-cults
http://en.wikipedia.org/wiki/Mass_suicide