Groovy Basics
Introduction To Groovy
Fluently Groovy PDF
greach 2014 marco vermeulen bdd using cucumber jvm and groovy
Grooscript greach
GTAC Boosting your Testing Productivity with Groovy
Oscon Java Testing on the Fast Lane
Groovy and Grails talk
WeCode IL: Confessions of a java developer that fell in love with the groovy language