These documents come from http://www.openspaceworld.org 
Open Space Technology Introduction, Part I.doc 
Open Space Technology Introduction, Part II.doc

These documents come from http://www.theworldcafe.com 
Open Space Technology - The World Cafe.htm
Open Space Technology - The World Cafe Guide - Open Space Technology.pdf 

Open Space Technology Introduction in Portuguese.doc 
comes from http://www.openspaceworld.org