Zaydiyyah 
An overview of Zaidi teachings and a history.
http://philtar.ucsm.ac.uk/encyclopedia/islam/shia/zaydi.htmlA Zaydi Revival?
An article examining the response of the Zaydi community to the current political situation in Yemen.
http://www.aiys.org/webdate/hayk.html
Zaidiyyah
Article about this Shī'a madhab, also known as the Fivers. [From Wikipedia]
http://en.wikipedia.org/wiki/Zaidiyyah
